Remove no longer used methods nextAncestorSibling() from NodeTraversal.h

Source/core/dom/NodeTraversal.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * 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
@@ skipping 56 matching lines @@
         return next;
     for (Node* parent = current.parentNode(); parent; parent = parent->parentNode()) {
         if (parent == stayWithin)
             return 0;
         if (Node* next = parent->pseudoAwareNextSibling())
             return next;
     }
     return 0;
 }
 
-Node* nextAncestorSibling(const Node& current)
-{
-    ASSERT(!current.nextSibling());
-    for (Node* parent = current.parentNode(); parent; parent = parent->parentNode()) {
-        if (parent->nextSibling())
-            return parent->nextSibling();
-    }
-    return 0;
-}
-
-Node* nextAncestorSibling(const Node& current, const Node* stayWithin)
-{
-    ASSERT(!current.nextSibling());
-    ASSERT(current != stayWithin);
-    for (Node* parent = current.parentNode(); parent; parent = parent->parentNode()) {
-        if (parent == stayWithin)
-            return 0;
-        if (parent->nextSibling())
-            return parent->nextSibling();
-    }
-    return 0;
-}
-
 Node* previous(const Node& current, const Node* stayWithin)
 {
     if (current == stayWithin)
         return 0;
     if (current.previousSibling()) {
         Node* previous = current.previousSibling();
         while (previous->lastChild())
             previous = previous->lastChild();
         return previous;
     }
@@ skipping 54 matching lines @@
 {
     if (current == stayWithin)
         return 0;
     if (current.previousSibling())
         return current.previousSibling();
     return previousAncestorSiblingPostOrder(current, stayWithin);
 }
 
 }
 }