Remove duplicated headers from core/

Source/core/editing/ReplaceSelectionCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 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:
  * 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 17 matching lines @@
 #include "core/editing/ReplaceSelectionCommand.h"
 
 #include "CSSPropertyNames.h"
 #include "HTMLNames.h"
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/css/CSSStyleDeclaration.h"
 #include "core/css/StylePropertySet.h"
 #include "core/dom/Document.h"
 #include "core/dom/DocumentFragment.h"
 #include "core/dom/Element.h"
-#include "core/dom/NodeTraversal.h"
 #include "core/dom/Text.h"
 #include "core/editing/ApplyStyleCommand.h"
 #include "core/editing/BreakBlockquoteCommand.h"
 #include "core/editing/FrameSelection.h"
 #include "core/editing/HTMLInterchange.h"
 #include "core/editing/SimplifyMarkupCommand.h"
 #include "core/editing/SmartReplace.h"
 #include "core/editing/TextIterator.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/htmlediting.h"
@@ skipping 1444 matching lines @@
         removeNodeAndPruneAncestors(nodeAfterInsertionPos.get());
 
     VisibleSelection selectionAfterReplace(m_selectReplacement ? start : end, end);
 
     setEndingSelection(selectionAfterReplace);
 
     return true;
 }
 
 } // namespace WebCore