gb/gprs_ns: call osmo_timer_del() unconditionally

osmo_timer_del() does check if a timer is active internally.

Change-Id: I3fdfcde33bc6f8a88680ad3f1dde2b6ff8846020
diff --git a/src/gb/gprs_ns.c b/src/gb/gprs_ns.c
index 9f5df8f..e250eda 100644
--- a/src/gb/gprs_ns.c
+++ b/src/gb/gprs_ns.c
@@ -352,8 +352,7 @@
  */
 void gprs_nsvc_delete(struct gprs_nsvc *nsvc)
 {
-	if (osmo_timer_pending(&nsvc->timer))
-		osmo_timer_del(&nsvc->timer);
+	osmo_timer_del(&nsvc->timer);
 	llist_del(&nsvc->list);
 	rate_ctr_group_free(nsvc->ctrg);
 	osmo_stat_item_group_free(nsvc->statg);
@@ -750,8 +749,7 @@
 		nsvc->nsei, get_value_string(timer_mode_strs, mode),
 		seconds);
 
-	if (osmo_timer_pending(&nsvc->timer))
-		osmo_timer_del(&nsvc->timer);
+	osmo_timer_del(&nsvc->timer);
 
 	osmo_gettimeofday(&nsvc->timer_started, NULL);
 	nsvc->timer_mode = mode;