Remove almost all of Oilpan

sky/engine/core/css/StylePropertySet.h

Index: sky/engine/core/css/StylePropertySet.h
diff --git a/sky/engine/core/css/StylePropertySet.h b/sky/engine/core/css/StylePropertySet.h
index e4ba37b57ea4cb508ff5eb2b26480377a4026abb..69c09607bd4c77cb469a5687bdc58e090b4c20b8 100644
--- a/sky/engine/core/css/StylePropertySet.h
+++ b/sky/engine/core/css/StylePropertySet.h
@@ -248,16 +248,6 @@ inline MutableStylePropertySet* toMutableStylePropertySet(const RefPtr<StyleProp
     return toMutableStylePropertySet(set.get());
 }
 
-inline MutableStylePropertySet* toMutableStylePropertySet(const Persistent<StylePropertySet>& set)
-{
-    return toMutableStylePropertySet(set.get());
-}
-
-inline MutableStylePropertySet* toMutableStylePropertySet(const Member<StylePropertySet>& set)
-{
-    return toMutableStylePropertySet(set.get());
-}
-
 inline const StylePropertyMetadata& StylePropertySet::PropertyReference::propertyMetadata() const
 {
     if (m_propertySet.isMutable())