Remove compiler feature detection for = delete

sky/engine/core/rendering/RenderMedia.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 24 matching lines @@
 class RenderMedia : public RenderImage {
 public:
     explicit RenderMedia(HTMLMediaElement*);
     virtual ~RenderMedia();
     virtual void trace(Visitor*) override;
 
     RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
 
     // If you have a RenderMedia, use firstChild or lastChild instead.
-    void slowFirstChild() const WTF_DELETED_FUNCTION;
-    void slowLastChild() const WTF_DELETED_FUNCTION;
+    void slowFirstChild() const = delete;
+    void slowLastChild() const = delete;
 
     const RenderObjectChildList* children() const { return &m_children; }
     RenderObjectChildList* children() { return &m_children; }
 
     HTMLMediaElement* mediaElement() const;
 
 private:
     virtual RenderObjectChildList* virtualChildren() override final { return children(); }
     virtual const RenderObjectChildList* virtualChildren() const override final { return children(); }
 
@@ skipping 10 matching lines @@
     virtual void paintReplaced(PaintInfo&, const LayoutPoint&) override;
 
     RenderObjectChildList m_children;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMedia, isMedia());
 
 } // namespace blink
 
 #endif // RenderMedia_h