diff --git a/dom/base/nsContentList.cpp b/dom/base/nsContentList.cpp
index 0021011bdb43..bcdf11abe589 100644
--- a/dom/base/nsContentList.cpp
+++ b/dom/base/nsContentList.cpp
@@ -208,8 +208,6 @@ NS_GetContentList(nsINode* aRootNode,
 
   static const PLDHashTableOps hash_table_ops =
   {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     ContentListHashtableHashKey,
     ContentListHashtableMatchEntry,
     PL_DHashMoveEntryStub,
@@ -320,8 +318,6 @@ GetFuncStringContentList(nsINode* aRootNode,
 
   static const PLDHashTableOps hash_table_ops =
   {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     FuncStringContentListHashtableHashKey,
     FuncStringContentListHashtableMatchEntry,
     PL_DHashMoveEntryStub,
diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index ac4bb1d93e32..7738c7cac5c1 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -479,8 +479,6 @@ nsContentUtils::Init()
   if (!sEventListenerManagersHash.ops) {
     static const PLDHashTableOps hash_table_ops =
     {
-      PL_DHashAllocTable,
-      PL_DHashFreeTable,
       PL_DHashVoidPtrKeyStub,
       PL_DHashMatchEntryStub,
       PL_DHashMoveEntryStub,
diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index 483465c0b256..0b3797929cfe 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -3972,8 +3972,6 @@ nsDocument::SetSubDocumentFor(Element* aElement, nsIDocument* aSubDoc)
 
       static const PLDHashTableOps hash_table_ops =
       {
-        PL_DHashAllocTable,
-        PL_DHashFreeTable,
         PL_DHashVoidPtrKeyStub,
         PL_DHashMatchEntryStub,
         PL_DHashMoveEntryStub,
diff --git a/dom/base/nsScriptNameSpaceManager.cpp b/dom/base/nsScriptNameSpaceManager.cpp
index 61693bd1e9fd..6811dc07d988 100644
--- a/dom/base/nsScriptNameSpaceManager.cpp
+++ b/dom/base/nsScriptNameSpaceManager.cpp
@@ -320,8 +320,6 @@ nsScriptNameSpaceManager::Init()
 {
   static const PLDHashTableOps hash_table_ops =
   {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     GlobalNameHashHashKey,
     GlobalNameHashMatchEntry,
     PL_DHashMoveEntryStub,
diff --git a/dom/xul/XULDocument.cpp b/dom/xul/XULDocument.cpp
index dd5f816ba7ee..2e90e013df0e 100644
--- a/dom/xul/XULDocument.cpp
+++ b/dom/xul/XULDocument.cpp
@@ -760,8 +760,6 @@ XULDocument::AddBroadcastListenerFor(Element& aBroadcaster, Element& aListener,
     }
 
     static const PLDHashTableOps gOps = {
-        PL_DHashAllocTable,
-        PL_DHashFreeTable,
         PL_DHashVoidPtrKeyStub,
         PL_DHashMatchEntryStub,
         PL_DHashMoveEntryStub,
diff --git a/embedding/components/commandhandler/nsCommandParams.cpp b/embedding/components/commandhandler/nsCommandParams.cpp
index e476b3e72f4f..79aaa69e4e77 100644
--- a/embedding/components/commandhandler/nsCommandParams.cpp
+++ b/embedding/components/commandhandler/nsCommandParams.cpp
@@ -16,8 +16,6 @@ using namespace mozilla;
 
 const PLDHashTableOps nsCommandParams::sHashOps =
 {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   HashKey,
   HashMatchEntry,
   HashMoveEntry,
diff --git a/gfx/thebes/gfxFT2FontList.cpp b/gfx/thebes/gfxFT2FontList.cpp
index 6c2f8c7a990e..7bf8cd99809a 100644
--- a/gfx/thebes/gfxFT2FontList.cpp
+++ b/gfx/thebes/gfxFT2FontList.cpp
@@ -622,8 +622,6 @@ public:
         : mWriteNeeded(false)
     {
         mOps = (PLDHashTableOps) {
-            PL_DHashAllocTable,
-            PL_DHashFreeTable,
             StringHash,
             HashMatchEntry,
             MoveEntry,
diff --git a/js/xpconnect/src/XPCMaps.cpp b/js/xpconnect/src/XPCMaps.cpp
index 342f9ea8d8bd..c70846f570bb 100644
--- a/js/xpconnect/src/XPCMaps.cpp
+++ b/js/xpconnect/src/XPCMaps.cpp
@@ -212,8 +212,6 @@ Native2WrappedNativeMap::SizeOfEntryExcludingThis(PLDHashEntryHdr *hdr,
 
 const struct PLDHashTableOps IID2WrappedJSClassMap::Entry::sOps =
 {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     HashIIDPtrKey,
     MatchIIDPtrKey,
     PL_DHashMoveEntryStub,
@@ -248,8 +246,6 @@ IID2WrappedJSClassMap::~IID2WrappedJSClassMap()
 
 const struct PLDHashTableOps IID2NativeInterfaceMap::Entry::sOps =
 {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     HashIIDPtrKey,
     MatchIIDPtrKey,
     PL_DHashMoveEntryStub,
@@ -452,8 +448,6 @@ NativeSetMap::Entry::Match(PLDHashTable *table,
 
 const struct PLDHashTableOps NativeSetMap::Entry::sOps =
 {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     HashNativeKey,
     Match,
     PL_DHashMoveEntryStub,
@@ -518,8 +512,6 @@ IID2ThisTranslatorMap::Entry::Clear(PLDHashTable *table, PLDHashEntryHdr *entry)
 
 const struct PLDHashTableOps IID2ThisTranslatorMap::Entry::sOps =
 {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     HashIIDPtrKey,
     Match,
     PL_DHashMoveEntryStub,
@@ -596,8 +588,6 @@ XPCNativeScriptableSharedMap::Entry::Match(PLDHashTable *table,
 
 const struct PLDHashTableOps XPCNativeScriptableSharedMap::Entry::sOps =
 {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     Hash,
     Match,
     PL_DHashMoveEntryStub,
diff --git a/layout/base/nsFrameManager.cpp b/layout/base/nsFrameManager.cpp
index 027396731127..e415153577d0 100644
--- a/layout/base/nsFrameManager.cpp
+++ b/layout/base/nsFrameManager.cpp
@@ -69,8 +69,6 @@ PlaceholderMapMatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
 }
 
 static const PLDHashTableOps PlaceholderMapOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashVoidPtrKeyStub,
   PlaceholderMapMatchEntry,
   PL_DHashMoveEntryStub,
diff --git a/layout/style/nsCSSRuleProcessor.cpp b/layout/style/nsCSSRuleProcessor.cpp
index c8fedcfc48bd..b2c4ec6c9a18 100644
--- a/layout/style/nsCSSRuleProcessor.cpp
+++ b/layout/style/nsCSSRuleProcessor.cpp
@@ -362,8 +362,6 @@ RuleHash_NameSpaceTable_MatchEntry(PLDHashTable *table,
 }
 
 static const PLDHashTableOps RuleHash_TagTable_Ops = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashVoidPtrKeyStub,
   RuleHash_TagTable_MatchEntry,
   RuleHash_TagTable_MoveEntry,
@@ -374,8 +372,6 @@ static const PLDHashTableOps RuleHash_TagTable_Ops = {
 // Case-sensitive ops.
 static const RuleHashTableOps RuleHash_ClassTable_CSOps = {
   {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashVoidPtrKeyStub,
   RuleHash_CSMatchEntry,
   RuleHash_MoveEntry,
@@ -388,8 +384,6 @@ static const RuleHashTableOps RuleHash_ClassTable_CSOps = {
 // Case-insensitive ops.
 static const RuleHashTableOps RuleHash_ClassTable_CIOps = {
   {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   RuleHash_CIHashKey,
   RuleHash_CIMatchEntry,
   RuleHash_MoveEntry,
@@ -402,8 +396,6 @@ static const RuleHashTableOps RuleHash_ClassTable_CIOps = {
 // Case-sensitive ops.
 static const RuleHashTableOps RuleHash_IdTable_CSOps = {
   {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashVoidPtrKeyStub,
   RuleHash_CSMatchEntry,
   RuleHash_MoveEntry,
@@ -416,8 +408,6 @@ static const RuleHashTableOps RuleHash_IdTable_CSOps = {
 // Case-insensitive ops.
 static const RuleHashTableOps RuleHash_IdTable_CIOps = {
   {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   RuleHash_CIHashKey,
   RuleHash_CIMatchEntry,
   RuleHash_MoveEntry,
@@ -428,8 +418,6 @@ static const RuleHashTableOps RuleHash_IdTable_CIOps = {
 };
 
 static const PLDHashTableOps RuleHash_NameSpaceTable_Ops = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   RuleHash_NameSpaceTable_HashKey,
   RuleHash_NameSpaceTable_MatchEntry,
   RuleHash_MoveEntry,
@@ -887,8 +875,6 @@ AtomSelector_GetKey(PLDHashTable *table, const PLDHashEntryHdr *hdr)
 
 // Case-sensitive ops.
 static const PLDHashTableOps AtomSelector_CSOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashVoidPtrKeyStub,
   PL_DHashMatchEntryStub,
   AtomSelector_MoveEntry,
@@ -899,8 +885,6 @@ static const PLDHashTableOps AtomSelector_CSOps = {
 // Case-insensitive ops.
 static const RuleHashTableOps AtomSelector_CIOps = {
   {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   RuleHash_CIHashKey,
   RuleHash_CIMatchEntry,
   AtomSelector_MoveEntry,
@@ -3337,8 +3321,6 @@ InitWeightEntry(PLDHashTable *table, PLDHashEntryHdr *hdr,
 }
 
 static const PLDHashTableOps gRulesByWeightOps = {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     HashIntKey,
     MatchWeightEntry,
     PL_DHashMoveEntryStub,
diff --git a/layout/style/nsHTMLStyleSheet.cpp b/layout/style/nsHTMLStyleSheet.cpp
index 1184501ac7c2..80a34b6cad8e 100644
--- a/layout/style/nsHTMLStyleSheet.cpp
+++ b/layout/style/nsHTMLStyleSheet.cpp
@@ -169,8 +169,6 @@ MappedAttrTable_MatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
 }
 
 static const PLDHashTableOps MappedAttrTable_Ops = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   MappedAttrTable_HashKey,
   MappedAttrTable_MatchEntry,
   PL_DHashMoveEntryStub,
@@ -225,8 +223,6 @@ LangRuleTable_InitEntry(PLDHashTable *table, PLDHashEntryHdr *hdr,
 }
 
 static const PLDHashTableOps LangRuleTable_Ops = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   LangRuleTable_HashKey,
   LangRuleTable_MatchEntry,
   PL_DHashMoveEntryStub,
diff --git a/layout/style/nsRuleNode.cpp b/layout/style/nsRuleNode.cpp
index eb63ba2306e0..180a8bfe6479 100644
--- a/layout/style/nsRuleNode.cpp
+++ b/layout/style/nsRuleNode.cpp
@@ -114,8 +114,6 @@ nsRuleNode::ChildrenHashOps = {
   // free rather than the pres shell's arena because the table doesn't
   // grow very often and the pres shell's arena doesn't recycle very
   // large size allocations.
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   ChildrenHashHashKey,
   ChildrenHashMatchEntry,
   PL_DHashMoveEntryStub,
diff --git a/layout/tables/SpanningCellSorter.cpp b/layout/tables/SpanningCellSorter.cpp
index 28c68e53da67..a9f7c542b026 100644
--- a/layout/tables/SpanningCellSorter.cpp
+++ b/layout/tables/SpanningCellSorter.cpp
@@ -33,8 +33,6 @@ SpanningCellSorter::~SpanningCellSorter()
 
 /* static */ const PLDHashTableOps
 SpanningCellSorter::HashTableOps = {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     HashTableHashKey,
     HashTableMatchEntry,
     PL_DHashMoveEntryStub,
diff --git a/modules/libpref/prefapi.cpp b/modules/libpref/prefapi.cpp
index 51424ff285df..a4f534086eb3 100644
--- a/modules/libpref/prefapi.cpp
+++ b/modules/libpref/prefapi.cpp
@@ -77,8 +77,6 @@ static bool         gShouldCleanupDeadNodes = false;
 
 
 static PLDHashTableOps     pref_HashTableOps = {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     PL_DHashStringKey,
     matchPrefEntry,
     PL_DHashMoveEntryStub,
diff --git a/netwerk/base/src/nsLoadGroup.cpp b/netwerk/base/src/nsLoadGroup.cpp
index 153590baae6e..4cc74cfcc1db 100644
--- a/netwerk/base/src/nsLoadGroup.cpp
+++ b/netwerk/base/src/nsLoadGroup.cpp
@@ -1156,8 +1156,6 @@ nsresult nsLoadGroup::Init()
 {
     static const PLDHashTableOps hash_table_ops =
     {
-        PL_DHashAllocTable,
-        PL_DHashFreeTable,
         PL_DHashVoidPtrKeyStub,
         RequestHashMatchEntry,
         PL_DHashMoveEntryStub,
diff --git a/netwerk/cache/nsCacheEntry.cpp b/netwerk/cache/nsCacheEntry.cpp
index bd8b8a24c558..56735d683fdc 100644
--- a/netwerk/cache/nsCacheEntry.cpp
+++ b/netwerk/cache/nsCacheEntry.cpp
@@ -377,8 +377,6 @@ nsCacheEntryInfo::IsStreamBased(bool * result)
 const PLDHashTableOps
 nsCacheEntryHashTable::ops =
 {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     HashKey,
     MatchEntry,
     MoveEntry,
diff --git a/netwerk/cache/nsDiskCacheBinding.cpp b/netwerk/cache/nsDiskCacheBinding.cpp
index 24b6c48831f7..7356bfc0ef1b 100644
--- a/netwerk/cache/nsDiskCacheBinding.cpp
+++ b/netwerk/cache/nsDiskCacheBinding.cpp
@@ -124,8 +124,6 @@ nsDiskCacheBinding::EnsureStreamIO()
 
 const PLDHashTableOps nsDiskCacheBindery::ops =
 {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     HashKey,
     MatchEntry,
     MoveEntry,
diff --git a/netwerk/dns/nsHostResolver.cpp b/netwerk/dns/nsHostResolver.cpp
index 165ce2d0254a..9a36663f591c 100644
--- a/netwerk/dns/nsHostResolver.cpp
+++ b/netwerk/dns/nsHostResolver.cpp
@@ -463,8 +463,6 @@ HostDB_InitEntry(PLDHashTable *table,
 
 static const PLDHashTableOps gHostDB_ops =
 {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     HostDB_HashKey,
     HostDB_MatchEntry,
     HostDB_MoveEntry,
diff --git a/netwerk/protocol/http/nsHttp.cpp b/netwerk/protocol/http/nsHttp.cpp
index 3f72aa548b30..5f49d8a2a5ce 100644
--- a/netwerk/protocol/http/nsHttp.cpp
+++ b/netwerk/protocol/http/nsHttp.cpp
@@ -85,8 +85,6 @@ StringCompare(PLDHashTable *table, const PLDHashEntryHdr *entry,
 }
 
 static const PLDHashTableOps ops = {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     StringHash,
     StringCompare,
     PL_DHashMoveEntryStub,
diff --git a/parser/htmlparser/nsHTMLEntities.cpp b/parser/htmlparser/nsHTMLEntities.cpp
index 68ca4135d15e..9120ca85ad25 100644
--- a/parser/htmlparser/nsHTMLEntities.cpp
+++ b/parser/htmlparser/nsHTMLEntities.cpp
@@ -52,8 +52,6 @@ static PLDHashNumber
 
 
 static const PLDHashTableOps EntityToUnicodeOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashStringKey,
   matchNodeString,
   PL_DHashMoveEntryStub,
@@ -62,8 +60,6 @@ static const PLDHashTableOps EntityToUnicodeOps = {
 }; 
 
 static const PLDHashTableOps UnicodeToEntityOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   hashUnicodeValue,
   matchNodeUnicode,
   PL_DHashMoveEntryStub,
diff --git a/rdf/base/nsRDFService.cpp b/rdf/base/nsRDFService.cpp
index 5c34b8895e85..94539dd8d88e 100644
--- a/rdf/base/nsRDFService.cpp
+++ b/rdf/base/nsRDFService.cpp
@@ -140,8 +140,6 @@ struct ResourceHashEntry : public PLDHashEntryHdr {
 };
 
 static const PLDHashTableOps gResourceTableOps = {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     ResourceHashEntry::HashKey,
     ResourceHashEntry::MatchEntry,
     PL_DHashMoveEntryStub,
@@ -177,8 +175,6 @@ struct LiteralHashEntry : public PLDHashEntryHdr {
 };
 
 static const PLDHashTableOps gLiteralTableOps = {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     LiteralHashEntry::HashKey,
     LiteralHashEntry::MatchEntry,
     PL_DHashMoveEntryStub,
@@ -213,8 +209,6 @@ struct IntHashEntry : public PLDHashEntryHdr {
 };
 
 static const PLDHashTableOps gIntTableOps = {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     IntHashEntry::HashKey,
     IntHashEntry::MatchEntry,
     PL_DHashMoveEntryStub,
@@ -253,8 +247,6 @@ struct DateHashEntry : public PLDHashEntryHdr {
 };
 
 static const PLDHashTableOps gDateTableOps = {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     DateHashEntry::HashKey,
     DateHashEntry::MatchEntry,
     PL_DHashMoveEntryStub,
@@ -372,8 +364,6 @@ struct BlobHashEntry : public PLDHashEntryHdr {
 };
 
 static const PLDHashTableOps gBlobTableOps = {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     BlobHashEntry::HashKey,
     BlobHashEntry::MatchEntry,
     PL_DHashMoveEntryStub,
diff --git a/security/manager/boot/src/nsSecureBrowserUIImpl.cpp b/security/manager/boot/src/nsSecureBrowserUIImpl.cpp
index f064cc43e62c..936d0e07a1cd 100644
--- a/security/manager/boot/src/nsSecureBrowserUIImpl.cpp
+++ b/security/manager/boot/src/nsSecureBrowserUIImpl.cpp
@@ -80,8 +80,6 @@ RequestMapInitEntry(PLDHashTable *table, PLDHashEntryHdr *hdr,
 }
 
 static const PLDHashTableOps gMapOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashVoidPtrKeyStub,
   RequestMapMatchEntry,
   PL_DHashMoveEntryStub,
diff --git a/security/manager/ssl/src/nsCertTree.cpp b/security/manager/ssl/src/nsCertTree.cpp
index 58d6265510e6..e6ffa179919f 100644
--- a/security/manager/ssl/src/nsCertTree.cpp
+++ b/security/manager/ssl/src/nsCertTree.cpp
@@ -92,8 +92,6 @@ CompareCacheClearEntry(PLDHashTable *table, PLDHashEntryHdr *hdr)
 }
 
 static const PLDHashTableOps gMapOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashVoidPtrKeyStub,
   CompareCacheMatchEntry,
   PL_DHashMoveEntryStub,
diff --git a/security/manager/ssl/src/nsNSSShutDown.cpp b/security/manager/ssl/src/nsNSSShutDown.cpp
index 1f42a0674455..93e091384e89 100644
--- a/security/manager/ssl/src/nsNSSShutDown.cpp
+++ b/security/manager/ssl/src/nsNSSShutDown.cpp
@@ -33,8 +33,6 @@ ObjectSetInitEntry(PLDHashTable *table, PLDHashEntryHdr *hdr,
 }
 
 static const PLDHashTableOps gSetOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashVoidPtrKeyStub,
   ObjectSetMatchEntry,
   PL_DHashMoveEntryStub,
diff --git a/uriloader/base/nsDocLoader.cpp b/uriloader/base/nsDocLoader.cpp
index 7eb458ed15cc..312de92c05d0 100644
--- a/uriloader/base/nsDocLoader.cpp
+++ b/uriloader/base/nsDocLoader.cpp
@@ -114,8 +114,6 @@ nsDocLoader::nsDocLoader()
 
   static const PLDHashTableOps hash_table_ops =
   {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     PL_DHashVoidPtrKeyStub,
     PL_DHashMatchEntryStub,
     PL_DHashMoveEntryStub,
diff --git a/xpcom/base/nsCycleCollector.cpp b/xpcom/base/nsCycleCollector.cpp
index f7b4f4b5391c..e6b9c5429165 100644
--- a/xpcom/base/nsCycleCollector.cpp
+++ b/xpcom/base/nsCycleCollector.cpp
@@ -801,8 +801,6 @@ PtrToNodeMatchEntry(PLDHashTable* aTable,
 }
 
 static PLDHashTableOps PtrNodeOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashVoidPtrKeyStub,
   PtrToNodeMatchEntry,
   PL_DHashMoveEntryStub,
diff --git a/xpcom/ds/nsAtomTable.cpp b/xpcom/ds/nsAtomTable.cpp
index f8a698f9334b..2d302ab3fb99 100644
--- a/xpcom/ds/nsAtomTable.cpp
+++ b/xpcom/ds/nsAtomTable.cpp
@@ -288,8 +288,6 @@ AtomTableInitEntry(PLDHashTable* aTable, PLDHashEntryHdr* aEntry,
 
 
 static const PLDHashTableOps AtomTableOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   AtomTableGetHash,
   AtomTableMatchKey,
   PL_DHashMoveEntryStub,
diff --git a/xpcom/ds/nsPersistentProperties.cpp b/xpcom/ds/nsPersistentProperties.cpp
index 6b9f28cc8421..3de7134b0152 100644
--- a/xpcom/ds/nsPersistentProperties.cpp
+++ b/xpcom/ds/nsPersistentProperties.cpp
@@ -50,8 +50,6 @@ ArenaStrdup(const nsAFlatCString& aString, PLArenaPool* aArena)
 }
 
 static const struct PLDHashTableOps property_HashTableOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashStringKey,
   PL_DHashMatchStringKey,
   PL_DHashMoveEntryStub,
diff --git a/xpcom/ds/nsStaticNameTable.cpp b/xpcom/ds/nsStaticNameTable.cpp
index df18d75fc564..09663f72153b 100644
--- a/xpcom/ds/nsStaticNameTable.cpp
+++ b/xpcom/ds/nsStaticNameTable.cpp
@@ -94,8 +94,6 @@ caseInsensitiveStringHashKey(PLDHashTable* aTable, const void* aKey)
 }
 
 static const struct PLDHashTableOps nametable_CaseInsensitiveHashTableOps = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   caseInsensitiveStringHashKey,
   matchNameKeysCaseInsensitive,
   PL_DHashMoveEntryStub,
diff --git a/xpcom/glue/nsTHashtable.h b/xpcom/glue/nsTHashtable.h
index c01c71bf43f3..bd3ccc1f3e80 100644
--- a/xpcom/glue/nsTHashtable.h
+++ b/xpcom/glue/nsTHashtable.h
@@ -419,8 +419,6 @@ nsTHashtable<EntryType>::Init(uint32_t aInitLength)
 {
   static const PLDHashTableOps sOps =
   {
-    ::PL_DHashAllocTable,
-    ::PL_DHashFreeTable,
     s_HashKey,
     s_MatchEntry,
     EntryType::ALLOW_MEMMOVE ? ::PL_DHashMoveEntryStub : s_CopyEntry,
diff --git a/xpcom/glue/pldhash.cpp b/xpcom/glue/pldhash.cpp
index df2ecc74d2e0..bde970a27c5c 100644
--- a/xpcom/glue/pldhash.cpp
+++ b/xpcom/glue/pldhash.cpp
@@ -68,18 +68,6 @@
 
 using namespace mozilla;
 
-void*
-PL_DHashAllocTable(PLDHashTable* aTable, uint32_t aNBytes)
-{
-  return malloc(aNBytes);
-}
-
-void
-PL_DHashFreeTable(PLDHashTable* aTable, void* aPtr)
-{
-  free(aPtr);
-}
-
 PLDHashNumber
 PL_DHashStringKey(PLDHashTable* aTable, const void* aKey)
 {
@@ -158,8 +146,6 @@ PL_DHashFreeStringKey(PLDHashTable* aTable, PLDHashEntryHdr* aEntry)
 }
 
 static const PLDHashTableOps stub_ops = {
-  PL_DHashAllocTable,
-  PL_DHashFreeTable,
   PL_DHashVoidPtrKeyStub,
   PL_DHashMatchEntryStub,
   PL_DHashMoveEntryStub,
@@ -185,13 +171,13 @@ PLDHashTable*
 PL_NewDHashTable(const PLDHashTableOps* aOps, uint32_t aEntrySize,
                  uint32_t aLength)
 {
-  PLDHashTable* table = (PLDHashTable*)aOps->allocTable(NULL, sizeof(*table));
+  PLDHashTable* table = (PLDHashTable*)malloc(sizeof(*table));
 
   if (!table) {
     return nullptr;
   }
   if (!PL_DHashTableInit(table, aOps, aEntrySize, fallible_t(), aLength)) {
-    aOps->freeTable(NULL, table);
+    free(table);
     return nullptr;
   }
   return table;
@@ -201,7 +187,7 @@ void
 PL_DHashTableDestroy(PLDHashTable* aTable)
 {
   PL_DHashTableFinish(aTable);
-  aTable->ops->freeTable(NULL, aTable);
+  free(aTable);
 }
 
 /*
@@ -263,7 +249,7 @@ PLDHashTable::Init(const PLDHashTableOps* aOps,
     return false;  // overflowed
   }
 
-  mEntryStore = (char*)aOps->allocTable(this, nbytes);
+  mEntryStore = (char*)malloc(nbytes);
   if (!mEntryStore) {
     return false;
   }
@@ -352,7 +338,7 @@ PLDHashTable::Finish()
   MOZ_ASSERT(RECURSION_LEVEL_SAFE_TO_FINISH(this));
 
   /* Free entry storage last. */
-  ops->freeTable(this, mEntryStore);
+  free(mEntryStore);
 }
 
 void
@@ -495,7 +481,7 @@ PLDHashTable::ChangeTable(int aDeltaLog2)
     return false;   // overflowed
   }
 
-  char* newEntryStore = (char*)ops->allocTable(this, nbytes);
+  char* newEntryStore = (char*)malloc(nbytes);
   if (!newEntryStore) {
     return false;
   }
@@ -534,7 +520,7 @@ PLDHashTable::ChangeTable(int aDeltaLog2)
     oldEntryAddr += mEntrySize;
   }
 
-  ops->freeTable(this, oldEntryStore);
+  free(oldEntryStore);
   return true;
 }
 
diff --git a/xpcom/glue/pldhash.h b/xpcom/glue/pldhash.h
index d8ef706fc4e0..8a6c2d21c232 100644
--- a/xpcom/glue/pldhash.h
+++ b/xpcom/glue/pldhash.h
@@ -299,15 +299,6 @@ private:
   bool ChangeTable(int aDeltaLog2);
 };
 
-/*
- * Table space at mEntryStore is allocated and freed using these callbacks.
- * The allocator should return null on error only (not if called with aNBytes
- * equal to 0; but note that pldhash.c code will never call with 0 aNBytes).
- */
-typedef void* (*PLDHashAllocTable)(PLDHashTable* aTable, uint32_t aNBytes);
-
-typedef void (*PLDHashFreeTable)(PLDHashTable* aTable, void* aPtr);
-
 /*
  * Compute the hash code for a given key to be looked up, added, or removed
  * from aTable.  A hash code may have any PLDHashNumber value.
@@ -352,13 +343,11 @@ typedef bool (*PLDHashInitEntry)(PLDHashTable* aTable, PLDHashEntryHdr* aEntry,
                                  const void* aKey);
 
 /*
- * Finally, the "vtable" structure for PLDHashTable.  The first six hooks
+ * Finally, the "vtable" structure for PLDHashTable.  The first four hooks
  * must be provided by implementations; they're called unconditionally by the
  * generic pldhash.c code.  Hooks after these may be null.
  *
  * Summary of allocation-related hook usage with C++ placement new emphasis:
- *  allocTable          Allocate raw bytes with malloc, no ctors run.
- *  freeTable           Free raw bytes with free, no dtors run.
  *  initEntry           Call placement new using default key-based ctor.
  *                      Return true on success, false on error.
  *  moveEntry           Call placement new using copy ctor, run dtor on old
@@ -379,8 +368,6 @@ typedef bool (*PLDHashInitEntry)(PLDHashTable* aTable, PLDHashEntryHdr* aEntry,
 struct PLDHashTableOps
 {
   /* Mandatory hooks.  All implementations must provide these. */
-  PLDHashAllocTable   allocTable;
-  PLDHashFreeTable    freeTable;
   PLDHashHashKey      hashKey;
   PLDHashMatchEntry   matchEntry;
   PLDHashMoveEntry    moveEntry;
@@ -393,9 +380,6 @@ struct PLDHashTableOps
 /*
  * Default implementations for the above ops.
  */
-void* PL_DHashAllocTable(PLDHashTable* aTable, uint32_t aNBytes);
-
-void PL_DHashFreeTable(PLDHashTable* aTable, void* aPtr);
 
 PLDHashNumber PL_DHashStringKey(PLDHashTable* aTable, const void* aKey);
 
@@ -433,10 +417,8 @@ void PL_DHashFreeStringKey(PLDHashTable* aTable, PLDHashEntryHdr* aEntry);
 const PLDHashTableOps* PL_DHashGetStubOps(void);
 
 /*
- * Dynamically allocate a new PLDHashTable using malloc, initialize it using
- * PL_DHashTableInit, and return its address.  Return null on malloc failure.
- * Note that the entry storage at aTable->mEntryStore will be allocated using
- * the aOps->allocTable callback.
+ * Dynamically allocate a new PLDHashTable, initialize it using
+ * PL_DHashTableInit, and return its address. Return null on allocation failure.
  */
 PLDHashTable* PL_NewDHashTable(
   const PLDHashTableOps* aOps, uint32_t aEntrySize,
@@ -490,9 +472,9 @@ void PL_DHashTableFinish(PLDHashTable* aTable);
  *  entry = PL_DHashTableOperate(table, key, PL_DHASH_ADD);
  *
  * If entry is null upon return, then either the table is severely overloaded,
- * and memory can't be allocated for entry storage via aTable->ops->allocTable;
- * Or if aTable->ops->initEntry is non-null, the aTable->ops->initEntry op may
- * have returned false.
+ * and memory can't be allocated for entry storage. Or if
+ * aTable->ops->initEntry is non-null, the aTable->ops->initEntry op may have
+ * returned false.
  *
  * Otherwise, aEntry->keyHash has been set so that PL_DHASH_ENTRY_IS_BUSY(entry)
  * is true, and it is up to the caller to initialize the key and value parts
diff --git a/xpcom/tests/TestPLDHash.cpp b/xpcom/tests/TestPLDHash.cpp
index 81a8aa91f340..d465670c281a 100644
--- a/xpcom/tests/TestPLDHash.cpp
+++ b/xpcom/tests/TestPLDHash.cpp
@@ -80,8 +80,6 @@ hash(PLDHashTable *table, const void *key)
 static bool test_pldhash_grow_to_max_capacity()
 {
   static const PLDHashTableOps ops = {
-    PL_DHashAllocTable,
-    PL_DHashFreeTable,
     hash,
     PL_DHashMatchEntryStub,
     PL_DHashMoveEntryStub,