Remove custom style callbacks.

sky/engine/core/dom/Element.h

Index: sky/engine/core/dom/Element.h
diff --git a/sky/engine/core/dom/Element.h b/sky/engine/core/dom/Element.h
index 58551f60fccd94be8f5a2fc9b060a1d5e5a442cf..f0c77cd3f637dd7702c1bb37361d350e7cbf85d7 100644
--- a/sky/engine/core/dom/Element.h
+++ b/sky/engine/core/dom/Element.h
@@ -315,10 +315,6 @@ protected:
     virtual void removedFrom(ContainerNode*) override;
     virtual void childrenChanged(const ChildrenChange&) override;
 
-    virtual void willRecalcStyle(StyleRecalcChange);
-    virtual void didRecalcStyle(StyleRecalcChange);
-    virtual PassRefPtr<RenderStyle> customStyleForRenderer();
-
     void clearTabIndexExplicitlyIfNeeded();
     void setTabIndexExplicitly(short);
     // Subclasses may override this method to affect focusability. Unlike
@@ -337,8 +333,6 @@ protected:
     // svgAttributeChanged (called when element.className.baseValue is set)
     void classAttributeChanged(const AtomicString& newClassString);
 
-    PassRefPtr<RenderStyle> originalStyleForRenderer();
-
 private:
     void attributeChanged(const QualifiedName&, const AtomicString&, AttributeModificationReason = ModifiedDirectly);