Remove duplicated headers from core/

Source/core/dom/shadow/ComposedTreeWalker.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 12 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (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 "core/dom/shadow/ComposedTreeWalker.h"
 
 #include "core/dom/Element.h"
 #include "core/dom/shadow/ElementShadow.h"
-#include "core/dom/shadow/InsertionPoint.h"
 #include "core/html/shadow/HTMLContentElement.h"
 #include "core/html/shadow/HTMLShadowElement.h"
 
 namespace WebCore {
 
 static inline ElementShadow* shadowFor(const Node* node)
 {
     if (node && node->isElementNode())
         return toElement(node)->shadow();
     return 0;
@@ skipping 114 matching lines @@
     ShadowRoot* shadowRoot = toShadowRoot(parent);
     ASSERT(!shadowRoot->shadowInsertionPointOfYoungerShadowRoot());
     if (!shadowRoot->isYoungest())
         return 0;
     if (details)
         details->didTraverseShadowRoot(shadowRoot);
     return shadowRoot->host();
 }
 
 } // namespace