tools/nolibc: remove __nolibc_enosys() fallback from *at() functions
All architectures have had one of the real functions available since
Linux 2.6.12. The additional fallback to __nolibc_enosys() is superfluous.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250821-nolibc-enosys-v1-2-4b63f2caaa89@weissschuh.net