Remove unused/unneeded code from core/editing.

Source/core/editing/Editor.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 184 matching lines @@
 bool Editor::canDHTMLCut()
 {
     return !frame().selection().isInPasswordField() && !dispatchCPPEvent(EventTypeNames::beforecut, DataTransferNumb);
 }
 
 bool Editor::canDHTMLCopy()
 {
     return !frame().selection().isInPasswordField() && !dispatchCPPEvent(EventTypeNames::beforecopy, DataTransferNumb);
 }
 
-bool Editor::canDHTMLPaste()
-{
-    return !dispatchCPPEvent(EventTypeNames::beforepaste, DataTransferNumb);
-}
-
 bool Editor::canCut() const
 {
     return canCopy() && canDelete();
 }
 
 static HTMLImageElement* imageElementFromImageDocument(Document* document)
 {
     if (!document)
         return 0;
     if (!document->isImageDocument())
@@ skipping 1059 matching lines @@
 }
 
 void Editor::trace(Visitor* visitor)
 {
     visitor->trace(m_frame);
     visitor->trace(m_lastEditCommand);
     visitor->trace(m_mark);
 }
 
 } // namespace blink