Remove compiler feature detection for = delete

sky/engine/core/dom/ContainerNode.h

Index: sky/engine/core/dom/ContainerNode.h
diff --git a/sky/engine/core/dom/ContainerNode.h b/sky/engine/core/dom/ContainerNode.h
index c625f986e038e3dd62e9a160724a935feae82a90..b82c470591524b74915484d61fed52d88a411b5f 100644
--- a/sky/engine/core/dom/ContainerNode.h
+++ b/sky/engine/core/dom/ContainerNode.h
@@ -142,8 +142,8 @@ protected:
     void setLastChild(Node* child) { m_lastChild = child; }
 
 private:
-    bool isContainerNode() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
-    bool isTextNode() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
+    bool isContainerNode() const = delete; // This will catch anyone doing an unnecessary check.
+    bool isTextNode() const = delete; // This will catch anyone doing an unnecessary check.
 
     void removeBetween(Node* previousChild, Node* nextChild, Node& oldChild);
     void insertBeforeCommon(Node& nextChild, Node& oldChild);