Flutter upgrade fixes

lib/ui/app/upgrade_dialog.dart

@@ -7,9 +7,7 @@ import 'dart:convert';
 import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter_redux/flutter_redux.dart';
-import 'package:flutter_styled_toast/flutter_styled_toast.dart';
 import 'package:in_app_purchase/in_app_purchase.dart';
-import 'package:in_app_purchase_android/billing_client_wrappers.dart';
 import 'package:in_app_purchase_android/in_app_purchase_android.dart';
 import 'package:in_app_purchase_storekit/in_app_purchase_storekit.dart';
 import 'package:in_app_purchase_storekit/store_kit_wrappers.dart';
@@ -17,7 +15,6 @@ import 'package:invoiceninja_flutter/constants.dart';
 import 'package:invoiceninja_flutter/data/web_client.dart';
 import 'package:invoiceninja_flutter/redux/app/app_actions.dart';
 import 'package:invoiceninja_flutter/redux/app/app_state.dart';
-import 'package:invoiceninja_flutter/utils/dialogs.dart';
 import 'package:invoiceninja_flutter/utils/localization.dart';
 import 'package:invoiceninja_flutter/utils/platforms.dart';
 import 'package:url_launcher/url_launcher.dart';
@@ -335,25 +332,6 @@ class _UpgradeDialogState extends State<UpgradeDialog> {
   }
 
   Future<void> confirmPriceChange(BuildContext context) async {
-    if (Platform.isAndroid) {
-      final localization = AppLocalization.of(context);
-      final InAppPurchaseAndroidPlatformAddition androidAddition =
-          _inAppPurchase
-              .getPlatformAddition<InAppPurchaseAndroidPlatformAddition>();
-      final BillingResultWrapper priceChangeConfirmationResult =
-          await androidAddition.launchPriceChangeConfirmationFlow(
-        sku: 'purchaseId',
-      );
-
-      if (priceChangeConfirmationResult.responseCode == BillingResponse.ok) {
-        showToast(localization!.priceChangeAccepted);
-      } else {
-        showErrorDialog(
-            message: priceChangeConfirmationResult.debugMessage ??
-                localization!.priceChangeFailed +
-                    ' ${priceChangeConfirmationResult.responseCode}');
-      }
-    }
     if (Platform.isIOS) {
       final InAppPurchaseStoreKitPlatformAddition iapStoreKitPlatformAddition =
           _inAppPurchase