Remove duplicated headers from modules/

Source/modules/mediastream/MediaConstraintsImpl.cpp

 /*
  * Copyright (C) 2012 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
@@ skipping 18 matching lines @@
  */
 
 #include "config.h"
 
 #include "modules/mediastream/MediaConstraintsImpl.h"
 
 #include "bindings/v8/ArrayValue.h"
 #include "bindings/v8/Dictionary.h"
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
-#include "wtf/HashMap.h"
 #include "wtf/text/StringHash.h"
 
 namespace WebCore {
 
 PassRefPtr<MediaConstraintsImpl> MediaConstraintsImpl::create(const Dictionary& constraints, ExceptionState& es)
 {
     RefPtr<MediaConstraintsImpl> object = adoptRef(new MediaConstraintsImpl());
     if (!object->initialize(constraints)) {
         es.throwUninformativeAndGenericDOMException(TypeMismatchError);
         return 0;
@@ skipping 100 matching lines @@
         if (i->m_name == name) {
             value = i->m_value;
             return true;
         }
     }
 
     return false;
 }
 
 } // namespace WebCore