Remove duplicated headers from core/

Source/core/events/EventRetargeter.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 16 matching lines @@
 #include "core/dom/TouchList.h"
 #include "core/dom/TreeScope.h"
 #include "core/dom/shadow/InsertionPoint.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/events/EventContext.h"
 #include "core/events/EventPath.h"
 #include "core/events/FocusEvent.h"
 #include "core/events/MouseEvent.h"
 #include "core/events/TouchEvent.h"
 #include "wtf/PassRefPtr.h"
-#include "wtf/RefPtr.h"
-#include "wtf/Vector.h"
 
 namespace WebCore {
 
 void EventRetargeter::adjustForMouseEvent(Node* node, MouseEvent& mouseEvent)
 {
     adjustForRelatedTarget(node, mouseEvent.relatedTarget(), mouseEvent.eventPath());
 }
 
 void EventRetargeter::adjustForFocusEvent(Node* node, FocusEvent& focusEvent)
 {
@@ skipping 118 matching lines @@
             break;
         }
         scope = scope->parentTreeScope();
     }
     for (Vector<TreeScope*, 32>::iterator iter = parentTreeScopes.begin(); iter < parentTreeScopes.end(); ++iter)
         relatedTargetMap.add(*iter, relatedNode);
     return relatedNode;
 }
 
 }