remove unneeded override (#121)

Author: Dieterbe

demos/django-todolist/lib/widgets/todo_item_dialog.dart

@@ -18,11 +18,6 @@ class _TodoItemDialogState extends State<TodoItemDialog> {
 
   _TodoItemDialogState();
 
-  @override
-  void initState() {
-    super.initState();
-  }
-
   @override
   void dispose() {
     super.dispose();