Remove MicroData implementation

Source/WebCore/html/HTMLTrackElement.cpp

 /*
  * Copyright (C) 2011 Google 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 341 matching lines @@
 
 HTMLMediaElement* HTMLTrackElement::mediaElement() const
 {
     Element* parent = parentElement();
     if (parent && parent->isMediaElement())
         return static_cast<HTMLMediaElement*>(parentNode());
 
     return 0;
 }
 
-#if ENABLE(MICRODATA)
-String HTMLTrackElement::itemValueText() const
-{
-    return getURLAttribute(srcAttr);
-}
-
-void HTMLTrackElement::setItemValueText(const String& value, ExceptionCode&)
-{
-    setAttribute(srcAttr, value);
-}
-#endif
-
 }
 
 #endif