Remove duplicated headers from core/

Source/core/dom/TreeWalker.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2008 Apple 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
@@ skipping 12 matching lines @@
  */
 
 #include "config.h"
 #include "core/dom/TreeWalker.h"
 
 #include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionState.h"
 #include "bindings/v8/ScriptState.h"
 #include "core/dom/ContainerNode.h"
 #include "core/dom/ExceptionCode.h"
-#include "core/dom/NodeFilter.h"
 #include "core/dom/NodeTraversal.h"
-#include "wtf/PassRefPtr.h"
 
 namespace WebCore {
 
 TreeWalker::TreeWalker(PassRefPtr<Node> rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> filter)
     : Traversal(rootNode, whatToShow, filter)
     , m_current(root())
 {
     ScriptWrappable::init(this);
 }
 
@@ skipping 228 matching lines @@
             return 0;
         if (acceptNodeResult == NodeFilter::FILTER_ACCEPT)
             return setCurrent(node.release());
         if (acceptNodeResult == NodeFilter::FILTER_SKIP)
             goto Children;
     }
     return 0;
 }
 
 } // namespace WebCore