posix-timers: Drop redundant memset() invocation

Initially in commit 6891c45 memset() was required to clear a variable
allocated on stack. Commit 2482097 removed the on stack variable and
retained the memset() despite the fact that the memory is allocated via
kmem_cache_zalloc() and therefore zereoed already.

Drop the redundant memset().

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/Z9ctVxwaYOV4A2g4@grain

kernel/time/posix-timers.c

@@ -526,7 +526,6 @@ static int do_timer_create(clockid_t which_clock, struct sigevent *event,
 	} else {
 		new_timer->it_sigev_notify     = SIGEV_SIGNAL;
 		new_timer->sigq.info.si_signo = SIGALRM;
-		memset(&new_timer->sigq.info.si_value, 0, sizeof(sigval_t));
 		new_timer->sigq.info.si_value.sival_int = new_timer->it_id;
 		new_timer->it_pid = get_pid(task_tgid(current));
 	}