Remove duplicated headers from modules/

Source/modules/mediastream/RTCSessionDescription.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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "modules/mediastream/RTCSessionDescription.h"
 
 #include "bindings/v8/Dictionary.h"
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
-#include "public/platform/WebRTCSessionDescription.h"
 
 namespace WebCore {
 
 static bool verifyType(const String& type)
 {
     return type == "offer" || type == "pranswer" || type == "answer";
 }
 
 static String constructIllegalTypeExceptionMessage(const String& type)
 {
@@ skipping 48 matching lines @@
 {
     m_webSessionDescription.setSDP(sdp);
 }
 
 blink::WebRTCSessionDescription RTCSessionDescription::webSessionDescription()
 {
     return m_webSessionDescription;
 }
 
 } // namespace WebCore