Remove the old task manager view

chrome/browser/task_manager/legacy_task_manager_tester.h

Index: chrome/browser/task_manager/legacy_task_manager_tester.h
diff --git a/chrome/browser/task_manager/legacy_task_manager_tester.h b/chrome/browser/task_manager/legacy_task_manager_tester.h
deleted file mode 100644
index ed4e6509c6c7166b1cf2f8d8c19d0dc832d85bb3..0000000000000000000000000000000000000000
--- a/chrome/browser/task_manager/legacy_task_manager_tester.h
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CHROME_BROWSER_TASK_MANAGER_LEGACY_TASK_MANAGER_TESTER_H_
-#define CHROME_BROWSER_TASK_MANAGER_LEGACY_TASK_MANAGER_TESTER_H_
-
-#include <memory>
-
-#include "base/callback_forward.h"
-#include "chrome/browser/task_management/task_manager_tester.h"
-
-namespace task_manager {
-
-// Create a LegacyTaskManagerTester for the old (deprecated, mac-only) task
-// manager. If you're writing a test, don't use this directly since it won't
-// work on other platforms. Use TaskManagerTester::Create() instead.
-std::unique_ptr<task_management::TaskManagerTester>
-CreateLegacyTaskManagerTester(const base::Closure& callback);
-
-}  // namespace task_manager
-
-#endif  // CHROME_BROWSER_TASK_MANAGER_LEGACY_TASK_MANAGER_TESTER_H_