refactor: Simplify getDefaultLocale method by removing device locale check

apps/mobile/packages/core_localization/lib/src/data/repositories_impl/locale_repository_impl.dart

@@ -1,4 +1,5 @@
 import 'dart:ui';
+
 import 'package:core_localization/src/l10n/strings.g.dart';
 
 import '../../domain/repositories/locale_repository_interface.dart';
@@ -33,10 +34,6 @@ class LocaleRepositoryImpl implements LocaleRepositoryInterface {
 
   @override
   Locale getDefaultLocale() {
-    final Locale deviceLocale = AppLocaleUtils.findDeviceLocale().flutterLocale;
-    if (getSupportedLocales().contains(deviceLocale)) {
-      return deviceLocale;
-    }
     return const Locale('en');
   }