Remove some dead code from rendering/ folder

Source/core/rendering/HitTestResult.cpp

 /*
  * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 344 matching lines @@
         return false;
     return m_innerNonSharedNode->document().markers().markersInRange(
         makeRange(pos, pos).get(), DocumentMarker::MisspellingMarkers()).size() > 0;
 }
 
 bool HitTestResult::isOverLink() const
 {
     return m_innerURLElement && m_innerURLElement->isLink();
 }
 
-String HitTestResult::titleDisplayString() const
-{
-    if (!m_innerURLElement)
-        return String();
-
-    return m_innerURLElement->title();
-}
-
 String HitTestResult::textContent() const
 {
     if (!m_innerURLElement)
         return String();
     return m_innerURLElement->textContent();
 }
 
 // FIXME: This function needs a better name and may belong in a different class. It's not
 // really isContentEditable(); it's more like needsEditingContextMenu(). In many ways, this
 // function would make more sense in the ContextMenu class, except that WebElementDictionary
@@ skipping 110 matching lines @@
 {
     for (Node* node = m_innerNode.get(); node; node = NodeRenderingTraversal::parent(node)) {
         if (node->isElementNode())
             return toElement(node);
     }
 
     return 0;
 }
 
 } // namespace WebCore