TF-2078 Hide mailbox loading bar when change state email

(cherry picked from commit 50fa29b2cd403dd3618cf6723e1a70e00c1e7a20)

lib/features/mailbox/presentation/base_mailbox_view.dart

@@ -1,6 +1,5 @@
 import 'package:core/presentation/extensions/color_extension.dart';
 import 'package:core/presentation/resources/image_paths.dart';
-import 'package:core/presentation/state/success.dart';
 import 'package:core/presentation/utils/responsive_utils.dart';
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
@@ -30,12 +29,4 @@ abstract class BaseMailboxView extends GetWidget<MailboxController>
       const Divider(color: AppColor.colorDividerMailbox, height: 1)
     ]);
   }
-
-  Widget buildLoadingView() {
-    return Obx(() => controller.viewState.value.fold(
-      (failure) => const SizedBox.shrink(),
-      (success) => success is LoadingState
-        ? Padding(padding: const EdgeInsets.only(top: 16), child: loadingWidget)
-        : const SizedBox.shrink()));
-  }
 }