Remove unnecessary return value

src/queues.c

@@ -179,7 +179,7 @@ bool queues_notification_replace_id(notification *new)
         return false;
 }
 
-int queues_notification_close_id(int id, enum reason reason)
+void queues_notification_close_id(int id, enum reason reason)
 {
         notification *target = NULL;
 
@@ -210,14 +210,12 @@ int queues_notification_close_id(int id, enum reason reason)
                         signal_notification_closed(target, reason);
                 queues_history_push(target);
         }
-
-        return reason;
 }
 
-int queues_notification_close(notification *n, enum reason reason)
+void queues_notification_close(notification *n, enum reason reason)
 {
         assert(n != NULL);
-        return queues_notification_close_id(n->id, reason);
+        queues_notification_close_id(n->id, reason);
 }
 
 void queues_history_pop(void)

src/queues.h

@@ -60,14 +60,14 @@ bool queues_notification_replace_id(notification *new);
  * After closing, call wake_up to synchronize the queues with the UI
  * (which closes the notification on screen)
  */
-int queues_notification_close_id(int id, enum reason reason);
+void queues_notification_close_id(int id, enum reason reason);
 
 /* Close the given notification. SEE queues_notification_close_id.
  *
  * @n: (transfer full): The notification to close
  * @reason: The reason to close
  * */
-int queues_notification_close(notification *n, enum reason reason);
+void queues_notification_close(notification *n, enum reason reason);
 
 /*
  * Pushed the latest notification of history to the displayed queue