Remove dead methods from CSSStyleSheet and StyleSheetContents.

sky/engine/core/css/StyleSheetContents.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2012 Apple Inc. All rights reserved.
  *
  * 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 43 matching lines @@
     if (rule->isMediaRule())
         setHasMediaQueries();
     m_childRules.append(rule);
 }
 
 void StyleSheetContents::setHasMediaQueries()
 {
     m_hasMediaQueries = true;
 }
 
-StyleRuleBase* StyleSheetContents::ruleAt(unsigned index) const
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(index < ruleCount());
-    return m_childRules[index].get();
-}
-
-unsigned StyleSheetContents::ruleCount() const
-{
-    return m_childRules.size();
-}
-
 bool StyleSheetContents::parseString(const String& sheetText)
 {
     CSSParserContext context(parserContext(), UseCounter::getFrom(this));
     BisonCSSParser p(context);
     p.parseSheet(this, sheetText);
     return true;
 }
 
 void StyleSheetContents::registerClient(CSSStyleSheet* sheet)
 {
@@ skipping 39 matching lines @@
     // Clearing the ruleSet means we need to recreate the styleResolver data structures.
     // See the StyleResolver calls in ScopedStyleResolver::addRulesFromSheet.
     for (RawPtr<CSSStyleSheet> client : m_clients) {
         if (Document* document = client->ownerDocument())
             document->styleEngine()->clearResolver();
     }
     m_ruleSet.clear();
 }
 
 }