!1047 Fix : pthread_cond_timedwait 信号丢失问题修复挑单到3.2-Release 分支

Merge pull request !1047 from yinjiaming/cherry-pick-1680588896

kal/posix/src/pthread_cond.c

@@ -303,7 +303,6 @@ int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
         PRINT_ERR("%s: %d failed\n", __FUNCTION__, __LINE__);
     }
 
-    (VOID)LOS_EventClear(&(cond->event), 0);
     ret = (INT32)LOS_EventRead(&(cond->event), 0x0f, LOS_WAITMODE_OR | LOS_WAITMODE_CLR, (UINT32)absTicks);
 
     if (pthread_mutex_lock(mutex) != 0) {