linux-user: remove _sysctl

It has been removed from linux since

  61a47c1ad3a4 ("sysctl: Remove the sysctl system call")

It's a good news because it was not really supported by qemu.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200930003033.554124-5-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
1 file changed