Remove duplicated headers from core/

Source/core/xml/XPathPredicate.cpp

 /*
  * Copyright 2005 Frerich Raabe <raabe@kde.org>
  * Copyright (C) 2006 Apple Computer, Inc.
  * 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
@@ skipping 13 matching lines @@
  * (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/XPathPredicate.h"
 
 #include <math.h>
 #include "core/xml/XPathFunctions.h"
 #include "core/xml/XPathUtil.h"
-#include "core/xml/XPathValue.h"
 #include "wtf/MathExtras.h"
 
 namespace WebCore {
 namespace XPath {
 
 Number::Number(double value)
     : m_value(value)
 {
 }
 
@@ skipping 221 matching lines @@
 
     // foo[3] means foo[position()=3]
     if (result.isNumber())
         return EqTestOp(EqTestOp::OP_EQ, adoptPtr(createFunction("position")), adoptPtr(new Number(result.toNumber()))).evaluate().toBoolean();
 
     return result.toBoolean();
 }
 
 }
 }