sig_timewait:remove useless assert

use sclock_t repalce int64 and int32

Signed-off-by: anjiahao <[email protected]>

Author: anjiahao1

sched/signal/sig_timedwait.c

@@ -242,11 +242,7 @@ int nxsig_timedwait(FAR const sigset_t *set, FAR struct siginfo *info,
   sigset_t intersection;
   FAR sigpendq_t *sigpend;
   irqstate_t flags;
-#ifdef CONFIG_SYSTEM_TIME64
-  int64_t waitticks;
-#else
-  int32_t waitticks;
-#endif
+  sclock_t waitticks;
   bool switch_needed;
   int ret;
 
@@ -328,7 +324,6 @@ int nxsig_timedwait(FAR const sigset_t *set, FAR struct siginfo *info,
           waitticks = ((uint64_t)timeout->tv_sec * NSEC_PER_SEC +
                       (uint64_t)timeout->tv_nsec + NSEC_PER_TICK - 1) /
                       NSEC_PER_TICK;
-          DEBUGASSERT(waitticks <= UINT32_MAX);
 #else
           uint32_t waitmsec;