ASScaffold remove exendBody option.

lib/scaffold/as_scaffold.dart

@@ -64,7 +64,6 @@ class _ASScaffoldState extends State<ASScaffold> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      extendBody: true,
       endDrawer: widget.endDrawer,
       backgroundColor: widget.backgroundColor,
       bottomNavigationBar: widget.bottomNavigationBar,