clean up

lib/localization/app_translations_delegate.dart

@@ -0,0 +1,25 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+import 'app_translations.dart';
+import 'transalation.dart';
+
+class AppTranslationsDelegate extends LocalizationsDelegate<AppTranslations> {
+  final Locale newLocale;
+
+  const AppTranslationsDelegate({this.newLocale});
+
+  @override
+  bool isSupported(Locale locale) {
+    return Translation().supportedLanguagesCodes.contains(locale.languageCode);
+  }
+
+  @override
+  Future<AppTranslations> load(Locale locale) {
+    return AppTranslations.load(newLocale ?? locale);
+  }
+
+  @override
+  bool shouldReload(LocalizationsDelegate<AppTranslations> old) {
+    return true;
+  }
+}