Remove unused includes from various .cpp files in core/

Source/core/editing/InsertTextCommand.cpp

 /*
  * Copyright (C) 2005 Apple Computer, 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
 #include "config.h"
 #include "core/editing/InsertTextCommand.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/Text.h"
 #include "core/editing/Editor.h"
-#include "core/editing/HTMLInterchange.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/htmlediting.h"
 #include "core/page/Frame.h"
 #include <wtf/unicode/CharacterNames.h>
 
 namespace WebCore {
 
 InsertTextCommand::InsertTextCommand(Document* document, const String& text, bool selectInsertedText, RebalanceType rebalanceType) 
     : CompositeEditCommand(document)
     , m_text(text)
@@ skipping 222 matching lines @@
                 splitTextNode(textNode, offset);
             insertNodeBefore(spanNode, textNode.release());
         }
     }
 
     // return the position following the new tab
     return lastPositionInNode(spanNode.get());
 }
 
 }