Remove duplicated headers from core/

Source/core/xml/XPathNodeSet.cpp

 /*
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  *
  * 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 10 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/xml/XPathNodeSet.h"
 
 #include "core/dom/Attr.h"
 #include "core/dom/Element.h"
-#include "core/dom/Node.h"
 #include "core/dom/NodeTraversal.h"
 
 namespace WebCore {
 namespace XPath {
 
 // When a node set is large, sorting it by traversing the whole document is better (we can
 // assume that we aren't dealing with documents that we cannot even traverse in reasonable time).
 const unsigned traversalSortCutoff = 10000;
 
 static inline Node* parentWithDepth(unsigned depth, const Vector<Node*>& parents)
@@ skipping 214 matching lines @@
 Node* NodeSet::anyNode() const
 {
     if (isEmpty())
         return 0;
 
     return m_nodes.at(0).get();
 }
 
 }
 }