Revert "Manually close tree while devicelab staging is failing (#74434)" (#74438)

This reverts commit 444c954f.

dev/devicelab/bin/tasks/hot_mode_dev_cycle_macos_target__benchmark.dart

@@ -2,14 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:flutter_devicelab/framework/task_result.dart';
 import 'package:flutter_devicelab/tasks/hot_mode_tests.dart';
 import 'package:flutter_devicelab/framework/framework.dart';
 
 Future<void> main() async {
   await task(createHotModeTest(deviceIdOverride: 'macos'));
-
-  // TODO(fujino): https://github.com/flutter/flutter/issues/74431
-  throw TaskResult.failure(
-      'Tree was manually closed for Android version of this test https://github.com/flutter/flutter/issues/74431');
 }