Addressed review comments

Author: H-G-Hristov

libcxx/include/__config

@@ -1215,20 +1215,6 @@ typedef __char32_t char32_t;
 #    define _LIBCPP_HAS_EXPLICIT_THIS_PARAMETER 0
 #  endif
 
-// TODO(LLVM 22): Remove this macro once LLVM19 support ends.
-#  if __has_builtin(__reference_constructs_from_temporary)
-#    define _LIBCPP_HAS_REFERENCE_CONSTRUCTS_FROM_TEMPORARY 1
-#  else
-#    define _LIBCPP_HAS_REFERENCE_CONSTRUCTS_FROM_TEMPORARY 0
-#  endif
-
-// TODO(LLVM 22): Remove this macro once LLVM19 support ends.
-#  if __has_builtin(__reference_converts_from_temporary)
-#    define _LIBCPP_HAS_REFERENCE_CONVERTS_FROM_TEMPORARY 1
-#  else
-#    define _LIBCPP_HAS_REFERENCE_CONVERTS_FROM_TEMPORARY 0
-#  endif
-
 #endif // __cplusplus
 
 #endif // _LIBCPP___CONFIG

libcxx/include/__type_traits/reference_constructs_from_temporary.h

@@ -18,9 +18,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_HAS_REFERENCE_CONSTRUCTS_FROM_TEMPORARY
-
-#  if _LIBCPP_STD_VER >= 23
+#if _LIBCPP_STD_VER >= 23
 
 template <class _Tp, class _Up>
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_NO_SPECIALIZATIONS reference_constructs_from_temporary
@@ -30,8 +28,6 @@ template <class _Tp, class _Up>
 _LIBCPP_NO_SPECIALIZATIONS inline constexpr bool reference_constructs_from_temporary_v =
     __reference_constructs_from_temporary(_Tp, _Up);
 
-#  endif
-
 #endif
 
 _LIBCPP_END_NAMESPACE_STD

libcxx/include/__type_traits/reference_converts_from_temporary.h

@@ -18,9 +18,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_HAS_REFERENCE_CONVERTS_FROM_TEMPORARY
-
-#  if _LIBCPP_STD_VER >= 23
+#if _LIBCPP_STD_VER >= 23
 
 template <class _Tp, class _Up>
 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_NO_SPECIALIZATIONS reference_converts_from_temporary
@@ -30,8 +28,6 @@ template <class _Tp, class _Up>
 _LIBCPP_NO_SPECIALIZATIONS inline constexpr bool reference_converts_from_temporary_v =
     __reference_converts_from_temporary(_Tp, _Up);
 
-#  endif
-
 #endif
 
 _LIBCPP_END_NAMESPACE_STD