Move periodic Screen update to App level.

lib/screen/pages/talk/chatList.dart

@@ -24,9 +24,6 @@ class _ChatListState extends State<ChatList> {
   void initState() {
     super.initState();
 
-    Timer.periodic(const Duration(seconds: 30), (Timer t) => {
-      setState((){}),
-    });
     Timer.periodic(const Duration(minutes: 1), (timer) {
       Provider.of<ChatListProps>(context, listen: false).run();
     });