fix(language_utils): remove traditional Chinese language support

Author: gokadzev

README.md

@@ -35,7 +35,7 @@ Lyrics support <br/>
 No ads <br/>
 No subscriptions <br/>
 Inbuilt updater <br/>
-22 supported languages <br/>
+21 supported languages <br/>
 Material UI & accent colors & dynamic colors (Android 12+) <br/>
 
 </center>

fastlane/metadata/android/en-US/full_description.txt

@@ -9,5 +9,5 @@
 * Lyrics support
 * No ads
 * No subscriptions
-* 22 supported languages
+* 21 supported languages
 * Material UI & accent colors & dynamic colors (Android 12+)

lib/localization/app_zh-Hant.arb

@@ -5,7 +5,6 @@ import 'package:musify/localization/app_localizations.dart';
 const appLanguages = <String>{
   'en',
   'zh',
-  'zh-Hant',
   'et',
   'fr',
   'de',
@@ -43,8 +42,6 @@ String getLanguageDisplayName(BuildContext context, String languageCode) {
       return l10n.languageEn;
     case 'zh':
       return l10n.languageZh;
-    case 'zh-Hant':
-      return l10n.languageZhHant;
     case 'et':
       return l10n.languageEt;
     case 'fr':