Remove duplicated headers

Source/web/WebEntities.cpp

 /*
  * Copyright (C) 2009 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 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 "WebEntities.h"
 
 #include "public/platform/WebString.h"
 #include <string.h>
-#include "wtf/HashMap.h"
 #include "wtf/text/StringBuilder.h"
-#include "wtf/text/WTFString.h"
 
 namespace blink {
 
 WebEntities::WebEntities(bool xmlEntities)
 {
     ASSERT(m_entitiesMap.isEmpty());
     m_entitiesMap.set(0x003c, "lt");
     m_entitiesMap.set(0x003e, "gt");
     m_entitiesMap.set(0x0026, "amp");
     m_entitiesMap.set(0x0027, "apos");
@@ skipping 29 matching lines @@
         }
     }
 
     if (!didConvertEntity)
         return value;
 
     return result.toString();
 }
 
 } // namespace blink