Remove dead markup serialization code.

sky/engine/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 24 matching lines @@
 #include "sky/engine/core/dom/Document.h"
 #include "sky/engine/core/dom/DocumentFragment.h"
 #include "sky/engine/core/dom/Element.h"
 #include "sky/engine/core/dom/Text.h"
 #include "sky/engine/core/editing/FrameSelection.h"
 #include "sky/engine/core/editing/HTMLInterchange.h"
 #include "sky/engine/core/editing/SmartReplace.h"
 #include "sky/engine/core/editing/TextIterator.h"
 #include "sky/engine/core/editing/VisibleUnits.h"
 #include "sky/engine/core/editing/htmlediting.h"
-#include "sky/engine/core/editing/markup.h"
 #include "sky/engine/core/events/BeforeTextInsertedEvent.h"
 #include "sky/engine/core/frame/LocalFrame.h"
 #include "sky/engine/core/frame/UseCounter.h"
 #include "sky/engine/core/html/HTMLElement.h"
 #include "sky/engine/core/rendering/RenderObject.h"
 #include "sky/engine/core/rendering/RenderText.h"
 #include "sky/engine/wtf/StdLibExtras.h"
 #include "sky/engine/wtf/Vector.h"
 
 namespace blink {
@@ skipping 950 matching lines @@
         return false;
 
     VisibleSelection selectionAfterReplace(m_selectReplacement ? start : end, end);
 
     setEndingSelection(selectionAfterReplace);
 
     return true;
 }
 
 } // namespace blink