Remove compiler feature detection for = delete

sky/engine/wtf/NullPtr.h

Index: sky/engine/wtf/NullPtr.h
diff --git a/sky/engine/wtf/NullPtr.h b/sky/engine/wtf/NullPtr.h
index 1aa558498346d66d4ecbaf04b6ec7ce119d9282d..9614104e97603a8abef9c8115c2d162e5e2cce6f 100644
--- a/sky/engine/wtf/NullPtr.h
+++ b/sky/engine/wtf/NullPtr.h
@@ -66,20 +66,11 @@ 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