Bug 1398291 - Remove remaining IsOSXLeopard leftover. r=mstange

--HG--
extra : rebase_source : 1b3cf1183d11c85d34a6dd713f71b7f4cbd002f3

xpcom/io/nsAppFileLocationProvider.h

@@ -45,10 +45,6 @@ protected:
   nsresult GetDefaultUserProfileRoot(nsIFile** aLocalFile,
                                      bool aLocal = false);
 
-#if defined(MOZ_WIDGET_COCOA)
-  static bool IsOSXLeopard();
-#endif
-
   nsCOMPtr<nsIFile> mMozBinDirectory;
 };