TF-3952 Change modal style in Forwarding

Signed-off-by: dab246 <tdvu@linagora.com>

lib/main/utils/app_config.dart

@@ -1,10 +1,8 @@
 import 'dart:io';
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_dotenv/flutter_dotenv.dart';
 import 'package:tmail_ui_user/features/login/data/network/config/oidc_constant.dart';
-import 'package:tmail_ui_user/main/localizations/app_localizations.dart';
 
 class AppConfig {
   const AppConfig._();
@@ -57,13 +55,14 @@ class AppConfig {
     }
   }
 
-  static String getForwardWarningMessage(BuildContext context) {
+  static String? get forwardWarningMessage {
     final forwardWarningMessage = dotenv.get(
-        'FORWARD_WARNING_MESSAGE',
-        fallback: AppLocalizations.of(context).messageWarningDialogForForwardsToOtherDomains);
+      'FORWARD_WARNING_MESSAGE',
+      fallback: '',
+    );
 
     if (forwardWarningMessage.trim().isEmpty) {
-      return AppLocalizations.of(context).messageWarningDialogForForwardsToOtherDomains;
+      return null;
     }
 
     return forwardWarningMessage;