Remove compiler feature detection for = delete

sky/engine/wtf/NullPtr.h

 /*
 
 Copyright (C) 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
@@ skipping 48 matching lines @@
     template<typename C, typename T> operator T C::*() { return 0; }
 private:
     // Do not allow taking the address of nullptr.
     void operator&();
 };
 }
 WTF_EXPORT extern const std::nullptr_t nullptr;
 
 #endif
 
-#if COMPILER_SUPPORTS(CXX_DELETED_FUNCTIONS)
 #define WTF_DISALLOW_CONSTRUCTION_FROM_ZERO(ClassName) \
     private: \
         ClassName(int) = delete
 #define WTF_DISALLOW_ZERO_ASSIGNMENT(ClassName) \
     private: \
         ClassName& operator=(int) = delete
-#else
-#define WTF_DISALLOW_CONSTRUCTION_FROM_ZERO(ClassName) \
-    private: \
-        ClassName(int)
-#define WTF_DISALLOW_ZERO_ASSIGNMENT(ClassName) \
-    private: \
-        ClassName& operator=(int)
-#endif
 
 #endif