diff --git a/modules/plugin/os2wrapper/moz_IDs_Generated.h b/modules/plugin/os2wrapper/moz_IDs_Generated.h
index 59a94bb98d84..629772464862 100644
--- a/modules/plugin/os2wrapper/moz_IDs_Generated.h
+++ b/modules/plugin/os2wrapper/moz_IDs_Generated.h
@@ -2229,9 +2229,6 @@ NP_DEF_ID(kRefreshURIIID, NS_IREFRESHURI_IID);
 #ifdef NS_IREGISTRY_IID
 NP_DEF_ID(kRegistryIID, NS_IREGISTRY_IID);
 #endif
-#ifdef NS_IRELATEDLINKSHANDLER_IID
-NP_DEF_ID(kRelatedLinksHandlerIID, NS_IRELATEDLINKSHANDLER_IID);
-#endif
 #ifdef NS_IRELATIVEFILEPREF_IID
 NP_DEF_ID(kRelativeFilePrefIID, NS_IRELATIVEFILEPREF_IID);
 #endif
@@ -5149,9 +5146,6 @@ static struct nsIDNameLookupEntry
 #ifdef NS_IREGISTRY_IID
     { &kRegistryIID, "NS_IREGISTRY_IID" },
 #endif
-#ifdef NS_IRELATEDLINKSHANDLER_IID
-    { &kRelatedLinksHandlerIID, "NS_IRELATEDLINKSHANDLER_IID" },
-#endif
 #ifdef NS_IRELATIVEFILEPREF_IID
     { &kRelativeFilePrefIID, "NS_IRELATIVEFILEPREF_IID" },
 #endif
@@ -8069,9 +8063,6 @@ static struct nsLookupStrIDEntry
 #ifdef NS_IREGISTRY_IID_STR
     { &kRegistryIID, NS_IREGISTRY_IID_STR },
 #endif
-#ifdef NS_IRELATEDLINKSHANDLER_IID_STR
-    { &kRelatedLinksHandlerIID, NS_IRELATEDLINKSHANDLER_IID_STR },
-#endif
 #ifdef NS_IRELATIVEFILEPREF_IID_STR
     { &kRelativeFilePrefIID, NS_IRELATIVEFILEPREF_IID_STR },
 #endif
diff --git a/modules/plugin/os2wrapper/moz_IDs_Input.lst b/modules/plugin/os2wrapper/moz_IDs_Input.lst
index 07254dfd03d7..e0c1d6282119 100644
--- a/modules/plugin/os2wrapper/moz_IDs_Input.lst
+++ b/modules/plugin/os2wrapper/moz_IDs_Input.lst
@@ -724,7 +724,6 @@ nsIReadConfig
 nsIRecyclingAllocator
 nsIRefreshURI
 nsIRegistry
-nsIRelatedLinksHandler
 nsIRelativeFilePref
 nsIRequest
 nsIRequestObserver
diff --git a/rdf/build/nsRDFCID.h b/rdf/build/nsRDFCID.h
index e239fabd7328..ef1213d81207 100644
--- a/rdf/build/nsRDFCID.h
+++ b/rdf/build/nsRDFCID.h
@@ -69,10 +69,6 @@
 #define NS_RDFFINDDATASOURCE_CID \
 { 0xe638d760, 0x8687, 0x11d2, { 0xb5, 0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x02 } }
 
-// {dc2fb186-f7ff-11d2-9820-f65ea652ae3c}
-#define NS_RDFRELATEDLINKSDATASOURCE_CID \
-{ 0xdc2fb186, 0xf7ff, 0x11d2, { 0x98, 0x20, 0xf6, 0x5e, 0xa6, 0x52, 0xae, 0x3c } }
-
 // {E638D761-8687-11d2-B530-000000000000}
 #define NS_RDFCOMPOSITEDATASOURCE_CID \
 { 0xe638d761, 0x8687, 0x11d2, { 0xb5, 0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 } }