I have reverted all contributions made by Jesse Towner in revision 110724

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119383 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/memory b/include/memory
index 86da721..c016154 100644
--- a/include/memory
+++ b/include/memory
@@ -1471,7 +1471,7 @@
 {
 };
 
-#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_ADVANCED_SFINAE)
+#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
 // uses-allocator construction
 
@@ -1489,7 +1489,7 @@
     : integral_constant<int, __uses_alloc_ctor_imp<_Tp, _Alloc, _Args...>::value>
     {};
 
-#endif  // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_ADVANCED_SFINAE)
+#endif  // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
 // allocator