todo time and unused imports

lib/other/intro_screen.dart

@@ -1,6 +1,4 @@
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';