Implement http://wg21.link/p0302r1: Removing Allocator Support in std::function. These functions never worked, and as far as I know, no one ever called them.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@284164 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/utilities/function.objects/func.wrap/func.wrap.func/derive_from.pass.cpp

@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++98, c++03
+// REQUIRES-ANY: c++11, c++14
 
 // <functional>
 
@@ -16,6 +17,8 @@
 #include <functional>
 #include <type_traits>
 
+#include "test_macros.h"
+
 using Fn = std::function<void()>;
 struct S : public std::function<void()> { using function::function; };