Remove old APIs from components/task_scheduler_util/.

components/task_scheduler_util/variations/browser_variations_util.h

-// 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.
-
-// TODO(fdoray): Remove this file once TaskScheduler initialization in the
-// browser process uses the components/task_scheduler_util/browser/ API on all
-// platforms.
-
-#ifndef COMPONENTS_TASK_SCHEDULER_UTIL_VARIATIONS_BROWSER_VARIATIONS_UTIL_H_
-#define COMPONENTS_TASK_SCHEDULER_UTIL_VARIATIONS_BROWSER_VARIATIONS_UTIL_H_
-
-#include <vector>
-
-#include "base/task_scheduler/scheduler_worker_pool_params.h"
-
-namespace task_scheduler_util {
-namespace variations {
-
-// Gets the browser SchedulerWorkerPoolParams vector based off of variations.
-// Returns an empty vector on failure.
-std::vector<base::SchedulerWorkerPoolParams>
-GetBrowserSchedulerWorkerPoolParamsFromVariations();
-
-// Redirects zero-to-many PostTask APIs to the browser task scheduler based off
-// of input from the variations parameters.
-void MaybePerformBrowserTaskSchedulerRedirection();
-
-}  // variations
-}  // namespace task_scheduler_util
-
-#endif  // COMPONENTS_TASK_SCHEDULER_UTIL_VARIATIONS_BROWSER_VARIATIONS_UTIL_H_