remove unused preference dialogs and provider from the project

lib/features/dashboard/screens/dashboard_screen.dart

@@ -13,7 +13,6 @@ import 'package:kmobile/features/enquiry/screens/enquiry_screen.dart';
 import 'package:kmobile/features/fund_transfer/screens/fund_transfer_beneficiary_screen.dart';
 import 'package:kmobile/features/quick_pay/screens/quick_pay_screen.dart';
 import 'package:kmobile/security/secure_storage.dart';
-import 'package:kmobile/src/preferences/preference.dart';
 import 'package:local_auth/local_auth.dart';
 import 'package:material_symbols_icons/material_symbols_icons.dart';
 import 'package:google_fonts/google_fonts.dart';
@@ -175,10 +174,10 @@ class _DashboardScreenState extends State<DashboardScreen> {
               child: InkWell(
                 borderRadius: BorderRadius.circular(20),
                 onTap: () {
-                  Navigator.push(
-                      context,
-                      MaterialPageRoute(
-                          builder: (context) => const Preference()));
+                  // Navigator.push(
+                  //     context,
+                  //     MaterialPageRoute(
+                  //         builder: (context) => const Preference()));
                 },
                 child: CircleAvatar(
                   backgroundColor: Colors.grey[200],