Remove dead markup serialization code.

sky/engine/core/frame/LocalFrame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 19 matching lines @@
 #include "sky/engine/config.h"
 #include "sky/engine/core/frame/LocalFrame.h"
 
 #include "gen/sky/platform/RuntimeEnabledFeatures.h"
 #include "sky/engine/bindings/core/v8/ScriptController.h"
 #include "sky/engine/core/editing/Editor.h"
 #include "sky/engine/core/editing/FrameSelection.h"
 #include "sky/engine/core/editing/InputMethodController.h"
 #include "sky/engine/core/editing/SpellChecker.h"
 #include "sky/engine/core/editing/htmlediting.h"
-#include "sky/engine/core/editing/markup.h"
 #include "sky/engine/core/events/Event.h"
 #include "sky/engine/core/fetch/ResourceFetcher.h"
 #include "sky/engine/core/frame/FrameConsole.h"
 #include "sky/engine/core/frame/FrameDestructionObserver.h"
 #include "sky/engine/core/frame/FrameHost.h"
 #include "sky/engine/core/frame/FrameView.h"
 #include "sky/engine/core/frame/LocalDOMWindow.h"
 #include "sky/engine/core/frame/Settings.h"
 #include "sky/engine/core/inspector/ConsoleMessageStorage.h"
 #include "sky/engine/core/loader/FrameLoaderClient.h"
@@ skipping 300 matching lines @@
 };
 
 double LocalFrame::devicePixelRatio() const
 {
     if (!m_host)
         return 0;
     return m_host->deviceScaleFactor();
 }
 
 } // namespace blink