Refactored the code so that DifficultyDropdown

is not longer needed

lib/widgets/difficulty_dropdown.dart

@@ -1,29 +0,0 @@
-import 'package:flutter/material.dart';
-
-import '../models/difficulty.dart';
-
-typedef Intcallback = void Function(int);
-
-class DifficultyDropdown extends StatelessWidget {
-  const DifficultyDropdown({super.key, this.onChanged});
-  final Intcallback? onChanged;
-
-  @override
-  Widget build(BuildContext context) {
-    List<DropdownMenuEntry<Difficulty>> dropdownMenuEntryList =
-        Difficulty.values.map((e) => _toDropdownMenuEntry(e, e.name)).toList();
-
-    return DropdownMenu<Difficulty?>(
-      dropdownMenuEntries: dropdownMenuEntryList,
-      onSelected: (value) {
-        if (onChanged != null) {
-          onChanged!(value?.index ?? -1);
-        }
-      },
-    );
-  }
-
-  DropdownMenuEntry<Difficulty> _toDropdownMenuEntry(
-          Difficulty difficulty, String text) =>
-      DropdownMenuEntry(value: difficulty, label: text);
-}