Removing a bunch of unused platform code.

Source/WebCore/page/Settings.h

 /*
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 208 matching lines @@
 #endif
 
         void setTiledBackingStoreEnabled(bool);
         bool tiledBackingStoreEnabled() const { return m_tiledBackingStoreEnabled; }
 
 #if USE(AVFOUNDATION)
         static void setAVFoundationEnabled(bool flag);
         static bool isAVFoundationEnabled() { return gAVFoundationEnabled; }
 #endif
 
-#if PLATFORM(MAC) || (PLATFORM(QT) && USE(QTKIT))
-        static void setQTKitEnabled(bool flag);
-        static bool isQTKitEnabled() { return gQTKitEnabled; }
-#endif
-
         static const unsigned defaultMaximumHTMLParserDOMTreeDepth = 512;
 
 #if USE(SAFARI_THEME)
         // Windows debugging pref (global) for switching between the Aqua look and a native windows look.
         static void setShouldPaintNativeControls(bool);
         static bool shouldPaintNativeControls() { return gShouldPaintNativeControls; }
 #endif
 
         static void setMockScrollbarsEnabled(bool flag);
         static bool mockScrollbarsEnabled();
@@ skipping 108 matching lines @@
 #if PLATFORM(WIN) || (OS(WINDOWS) && PLATFORM(WX))
         static bool gShouldUseHighResolutionTimers;
 #endif
 
         static double gHiddenPageDOMTimerAlignmentInterval;
     };
 
 } // namespace WebCore
 
 #endif // Settings_h