Remove duplicated headers from core/

Source/core/html/shadow/HTMLContentElement.cpp

 /*
  * Copyright (C) 2011 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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 11 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/html/shadow/HTMLContentElement.h"
 
 #include "HTMLNames.h"
 #include "core/css/CSSParser.h"
-#include "core/css/CSSSelectorList.h"
 #include "core/css/SelectorChecker.h"
 #include "core/css/SiblingTraversalStrategies.h"
 #include "core/dom/QualifiedName.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/ShadowRoot.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
@@ skipping 70 matching lines @@
 bool HTMLContentElement::matchSelector(const Vector<Node*, 32>& siblings, int nth) const
 {
     for (const CSSSelector* selector = selectorList().first(); selector; selector = CSSSelectorList::next(selector)) {
         if (checkOneSelector(selector, siblings, nth))
             return true;
     }
     return false;
 }
 
 }