Remove dead code from StyleEngine.

sky/engine/core/dom/StyleEngine.h

Index: sky/engine/core/dom/StyleEngine.h
diff --git a/sky/engine/core/dom/StyleEngine.h b/sky/engine/core/dom/StyleEngine.h
index e437f6ebfa61b3a4620dc775e57966dbe684f026..d1c905c20a812971895751ecbda19b7b45e57dcf 100644
--- a/sky/engine/core/dom/StyleEngine.h
+++ b/sky/engine/core/dom/StyleEngine.h
@@ -75,20 +75,14 @@ public:
 #endif
 
     const Vector<RefPtr<StyleSheet> >& styleSheetsForStyleSheetList(TreeScope&);
-    const Vector<RefPtr<CSSStyleSheet> >& activeAuthorStyleSheets() const;
 
     const Vector<RefPtr<CSSStyleSheet> >& documentAuthorStyleSheets() const { return m_authorStyleSheets; }
 
-    const Vector<RefPtr<CSSStyleSheet> > activeStyleSheetsForInspector() const;
-
     void modifiedStyleSheet(StyleSheet*);
     void addStyleSheetCandidateNode(Node*, bool createdByParser);
-    void removeStyleSheetCandidateNode(Node*);
     void removeStyleSheetCandidateNode(Node*, ContainerNode* scopingNode, TreeScope&);
-    void modifiedStyleSheetCandidateNode(Node*);
 
     void clearMediaQueryRuleSetStyleSheets();
-    void updateStyleSheetsInImport(DocumentStyleSheetCollector& parentCollector);
     void updateActiveStyleSheets(StyleResolverUpdateMode);
 
     bool ignoringPendingStylesheets() const { return m_ignorePendingStylesheets; }