[clang] [z/OS] Make sure __alignas_is_defined and __alignof_is_defined are defined on z/OS. (PR #115368)

[Zibi Sarbinowski via cfe-commits]

https://github.com/zibi2 created https://github.com/llvm/llvm-project/pull/115368

None

>From 34569fd0fbe6894d598d48e2088040ee730d308d Mon Sep 17 00:00:00 2001
From: Zbigniew Sarbinowski <zibi at ca.ibm.com>
Date: Thu, 7 Nov 2024 20:27:52 +0000
Subject: [PATCH] Make sure __alignas_is_defined and __alignof_is_defined are
 defined on z/OS

---
 clang/lib/Headers/stdalign.h | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/clang/lib/Headers/stdalign.h b/clang/lib/Headers/stdalign.h
index 56cdfa52d4bafa..158508e65d2b34 100644
--- a/clang/lib/Headers/stdalign.h
+++ b/clang/lib/Headers/stdalign.h
@@ -10,10 +10,6 @@
 #ifndef __STDALIGN_H
 #define __STDALIGN_H
 
-#if defined(__MVS__) && __has_include_next(<stdalign.h>)
-#include_next <stdalign.h>
-#else
-
 #if defined(__cplusplus) ||                                                    \
     (defined(__STDC_VERSION__) && __STDC_VERSION__ < 202311L)
 #ifndef __cplusplus
@@ -25,5 +21,4 @@
 #define __alignof_is_defined 1
 #endif /* __STDC_VERSION__ */
 
-#endif /* __MVS__ */
 #endif /* __STDALIGN_H */