Remove unused includes from various .cpp files in core/

Source/core/editing/IndentOutdentCommand.cpp

 /*
  * Copyright (C) 2006, 2008 Apple 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 10 matching lines @@
  * 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/editing/IndentOutdentCommand.h"
 
 #include "HTMLNames.h"
 #include "core/dom/Document.h"
-#include "core/dom/Range.h"
-#include "core/dom/Text.h"
-#include "core/editing/InsertLineBreakCommand.h"
 #include "core/editing/InsertListCommand.h"
-#include "core/editing/SplitElementCommand.h"
-#include "core/editing/TextIterator.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/htmlediting.h"
 #include "core/html/HTMLElement.h"
 #include "core/rendering/RenderObject.h"
 #include <wtf/StdLibExtras.h>
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
@@ skipping 186 matching lines @@
 
 void IndentOutdentCommand::formatRange(const Position& start, const Position& end, const Position&, RefPtr<Element>& blockquoteForNextIndent)
 {
     if (tryIndentingAsListItem(start, end))
         blockquoteForNextIndent = 0;
     else
         indentIntoBlockquote(start, end, blockquoteForNextIndent);
 }
 
 }