[libc++] s/_VSTD::_IsSame/_IsSame/. NFCI.

diff --git a/libcxx/include/concepts b/libcxx/include/concepts
index 3dec9b5..99b340f 100644 (file)
--- a/libcxx/include/concepts
+++ b/libcxx/include/concepts
@@ -150,7 +150,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 // [concept.same]
 
 template<class _Tp, class _Up>
-concept __same_as_impl = _VSTD::_IsSame<_Tp, _Up>::value;
+concept __same_as_impl = _IsSame<_Tp, _Up>::value;
 
 template<class _Tp, class _Up>
 concept same_as = __same_as_impl<_Tp, _Up> && __same_as_impl<_Up, _Tp>;