Cleanup usages of _LIBCPP_HAS_NO_<c++11-feature> in <bitset>, <ios>, <locale>, and <iterator>

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@300648 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/ios b/include/ios
index 49f0c01..61d00b9 100644
--- a/include/ios
+++ b/include/ios
@@ -657,7 +657,7 @@
 
     _LIBCPP_INLINE_VISIBILITY 
     void move(basic_ios& __rhs);
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_ALWAYS_INLINE
     void move(basic_ios&& __rhs) {move(__rhs);}
 #endif