Remove second set of clients from StyleSheetContents.

sky/engine/core/css/StyleSheetContents.h

Index: sky/engine/core/css/StyleSheetContents.h
diff --git a/sky/engine/core/css/StyleSheetContents.h b/sky/engine/core/css/StyleSheetContents.h
index 2fff934503bc91d93445e6e611c241694706daec..3ee88c4905da985c242e927de66a516dcde4c254 100644
--- a/sky/engine/core/css/StyleSheetContents.h
+++ b/sky/engine/core/css/StyleSheetContents.h
@@ -80,8 +80,6 @@ public:
 private:
     explicit StyleSheetContents(const CSSParserContext&);
 
-    void notifyRemoveFontFaceRule(const StyleRuleFontFace*);
-
     bool m_usesRemUnits : 1;
     bool m_hasMediaQueries : 1;
 
@@ -89,9 +87,7 @@ private:
     Vector<RefPtr<StyleRuleBase> > m_childRules;
     CSSParserContext m_parserContext;
 
-    HashSet<RawPtr<CSSStyleSheet> > m_loadingClients;
-    HashSet<RawPtr<CSSStyleSheet> > m_completedClients;
-    typedef HashSet<RawPtr<CSSStyleSheet> >::iterator ClientsIterator;
+    HashSet<RawPtr<CSSStyleSheet> > m_clients;
 };
 
 } // namespace