Bug 1392630 Remove unused variables r=froydnj

MozReview-Commit-ID: eSbnMzdWZm

--HG--
extra : rebase_source : c432a7d08b845fc102251faadeb7200a4991294a

xpcom/build/LateWriteChecks.cpp

@@ -140,7 +140,7 @@ LateWriteObserver::Observe(IOInterposeObserver::Observation& aOb)
   HANDLE hFile;
   do {
     // mkstemp isn't supported so keep trying until we get a file
-    int result = _mktemp_s(name, strlen(name) + 1);
+    _mktemp_s(name, strlen(name) + 1);
     hFile = CreateFileA(name, GENERIC_WRITE, 0, nullptr, CREATE_NEW,
                         FILE_ATTRIBUTE_NORMAL, nullptr);
   } while (GetLastError() == ERROR_FILE_EXISTS);

xpcom/io/SpecialSystemDirectory.cpp

@@ -123,9 +123,8 @@ GetLibrarySaveToPath(int aFallbackFolderId, REFKNOWNFOLDERID aFolderId,
 {
   RefPtr<IShellLibrary> shellLib;
   RefPtr<IShellItem> savePath;
-  HRESULT hr =
-    SHLoadLibraryFromKnownFolder(aFolderId, STGM_READ,
-                                 IID_IShellLibrary, getter_AddRefs(shellLib));
+  SHLoadLibraryFromKnownFolder(aFolderId, STGM_READ,
+                               IID_IShellLibrary, getter_AddRefs(shellLib));
 
   if (shellLib &&
       SUCCEEDED(shellLib->GetDefaultSaveFolder(DSFT_DETECT, IID_IShellItem,