git: d3de5c5b4529 - stable/13 - cdefs.h: Don't define fallback for _Static_assert

The branch stable/13 has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=d3de5c5b45293d15f8b87f2e529318dd99988d4c

commit d3de5c5b45293d15f8b87f2e529318dd99988d4c
Author:     Warner Losh <imp@FreeBSD.org>
AuthorDate: 2024-07-20 15:57:53 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2024-07-20 16:11:49 +0000

    cdefs.h: Don't define fallback for _Static_assert
    
    Remove pre 4.6 code to define _Static_assert in terms of _COUNTER.  We
    no longer need to support compilers this old (in fact support for all
    pre gcc 10 compilers has been removed in -current). This is a partial
    MFC of that work because removing this fixes a bug that's oft reported
    with -pedantic-errors and C++98 compilations.
    
    PR: 280382, 276738
    Sponsored by:           Netflix
    
    This is a direct commit to stable/14.
    
    (cherry picked from commit 22cdafe197ac960c5ce839ef6ec699b59f4b0080)
---
 sys/sys/cdefs.h | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/sys/sys/cdefs.h b/sys/sys/cdefs.h
index d9e1c476f1ef..080ae0912210 100644
--- a/sys/sys/cdefs.h
+++ b/sys/sys/cdefs.h
@@ -278,15 +278,6 @@
 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \
     __has_extension(cxx_static_assert)
 #define	_Static_assert(x, y)	static_assert(x, y)
-#elif __GNUC_PREREQ__(4,6) && !defined(__cplusplus)
-/* Nothing, gcc 4.6 and higher has _Static_assert built-in */
-#elif defined(__COUNTER__)
-#define	_Static_assert(x, y)	__Static_assert(x, __COUNTER__)
-#define	__Static_assert(x, y)	___Static_assert(x, y)
-#define	___Static_assert(x, y)	typedef char __assert_ ## y[(x) ? 1 : -1] \
-				__unused
-#else
-#define	_Static_assert(x, y)	struct __hack
 #endif
 #endif