move GetDelegate to navigation ext

-import 'package:example_nav2/app/routes/app_pages.dart';
 import 'package:flutter/material.dart';
-
 import 'package:get/get.dart';
 
+import '../../../routes/app_pages.dart';
 import '../controllers/root_controller.dart';
 import 'drawer.dart';
 

-import 'package:flutter/widgets.dart';
-
 import '../../get_core/src/get_interface.dart';
 import '../../route_manager.dart';
 import 'get_instance.dart';
@@ -130,10 +128,4 @@ extension Inst on GetInterface {
   /// [Get.lazyPut()], is registered in memory.
   /// - [tag] optional, if you use a [tag] to register the Instance.
   bool isPrepared<S>({String? tag}) => GetInstance().isPrepared<S>(tag: tag);
-
-  /// Casts the stored router delegate to a desired type
-  TDelegate? delegate<TDelegate extends RouterDelegate<TPage>, TPage>() =>
-      routerDelegate as TDelegate?;
-
-  GetDelegate? getDelegate() => delegate<GetDelegate, GetNavConfig>();
 }

@@ -282,14 +282,14 @@ class GetDelegate extends RouterDelegate<GetNavConfig>
     refresh();
   }
 
-  GetPage _notFound() {
-    return notFoundRoute ??= GetPage(
-      name: '/404',
-      page: () => Scaffold(
-        body: Text('not found'),
-      ),
-    );
-  }
+  // GetPage _notFound() {
+  //   return notFoundRoute ??= GetPage(
+  //     name: '/404',
+  //     page: () => Scaffold(
+  //       body: Text('not found'),
+  //     ),
+  //   );
+  // }
 
   Future<bool> handlePopupRoutes({
     Object? result,