[glibc] linux: Remove __ASSUME_ATFCTS

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=bbedd75c41ff801c7606bbaf1b7bdfc45d3f45a5

commit bbedd75c41ff801c7606bbaf1b7bdfc45d3f45a5
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Tue Aug 25 16:57:12 2020 -0300

    linux: Remove __ASSUME_ATFCTS
    
    The __have_atfcts is not used anywhere.
    
    Checked on x86_64-linux-gnu.

Diff:
---
 io/openat.c                               | 5 -----
 sysdeps/unix/sysv/linux/kernel-features.h | 4 ----
 2 files changed, 9 deletions(-)

diff --git a/io/openat.c b/io/openat.c
index a7ce65bee2..2f5a9f04de 100644
--- a/io/openat.c
+++ b/io/openat.c
@@ -23,11 +23,6 @@
 #include <sys/stat.h>
 #include <kernel-features.h>
 
-/* Some mostly-generic code (e.g. sysdeps/posix/getcwd.c) uses this variable
-   if __ASSUME_ATFCTS is not defined.  */
-#ifndef __ASSUME_ATFCTS
-int __have_atfcts;
-#endif
 
 /* Open FILE with access OFLAG.  Interpret relative paths relative to
    the directory associated with FD.  If O_CREAT or O_TMPFILE is in OFLAG, a
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index a6bbc3c94e..e648eecc0d 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -49,10 +49,6 @@
    SH this appeared first in 2.6.19-rc1, on ia64 in 2.6.22-rc1.  */
 #define __ASSUME_PSELECT	1
 
-/* The *at syscalls were introduced just after 2.6.16-rc1.  On PPC
-   they were introduced in 2.6.17-rc1, on SH in 2.6.19-rc1.  */
-#define __ASSUME_ATFCTS	1
-
 /* Support for inter-process robust mutexes was added in 2.6.17 (but
    some architectures lack futex_atomic_cmpxchg_inatomic in some
    configurations).  */