Remove unused code behind USE(PLATFORM_TEXT_TRACK_MENU)

Source/core/platform/graphics/MediaPlayer.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 836 matching lines @@
 bool MediaPlayer::requiresTextTrackRepresentation() const
 {
     return m_private->requiresTextTrackRepresentation();
 }
 
 void MediaPlayer::setTextTrackRepresentation(TextTrackRepresentation* representation)
 {
     m_private->setTextTrackRepresentation(representation);
 }
 
-#if USE(PLATFORM_TEXT_TRACK_MENU)
-bool MediaPlayer::implementsTextTrackControls() const
-{
-    return m_private->implementsTextTrackControls();
 }
-
-PassRefPtr<PlatformTextTrackMenuInterface> MediaPlayer::textTrackMenu()
-{
-    return m_private->textTrackMenu();
-}
-#endif // USE(PLATFORM_TEXT_TRACK_MENU)
-
-}