Remove duplicated headers from modules/

Source/modules/speech/SpeechSynthesis.cpp

 /*
  * Copyright (C) 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 11 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "modules/speech/SpeechSynthesis.h"
 
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/platform/PlatformSpeechSynthesisVoice.h"
-#include "core/platform/PlatformSpeechSynthesizer.h"
 #include "modules/speech/SpeechSynthesisEvent.h"
-#include "modules/speech/SpeechSynthesisUtterance.h"
 #include "wtf/CurrentTime.h"
 
 namespace WebCore {
 
 PassRefPtr<SpeechSynthesis> SpeechSynthesis::create(ExecutionContext* context)
 {
     return adoptRef(new SpeechSynthesis(context));
 }
 
 SpeechSynthesis::SpeechSynthesis(ExecutionContext* context)
@@ skipping 178 matching lines @@
     if (utterance->client())
         handleSpeakingCompleted(static_cast<SpeechSynthesisUtterance*>(utterance->client()), true);
 }
 
 const AtomicString& SpeechSynthesis::interfaceName() const
 {
     return EventTargetNames::SpeechSynthesisUtterance;
 }
 
 } // namespace WebCore