Revert of Extract bitrate allocation of spatial/temporal layers out of codec impl.

webrtc/modules/video_coding/utility/default_video_bitrate_allocator.h

-/*
- *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_MODULES_VIDEO_CODING_UTILITY_DEFAULT_VIDEO_BITRATE_ALLOCATOR_H_
-#define WEBRTC_MODULES_VIDEO_CODING_UTILITY_DEFAULT_VIDEO_BITRATE_ALLOCATOR_H_
-
-#include "webrtc/common_video/include/video_bitrate_allocator.h"
-
-namespace webrtc {
-
-class DefaultVideoBitrateAllocator : public VideoBitrateAllocator {
- public:
-  explicit DefaultVideoBitrateAllocator(const VideoCodec& codec);
-  ~DefaultVideoBitrateAllocator() override;
-
-  BitrateAllocation GetAllocation(uint32_t total_bitrate,
-                                  uint32_t framerate) override;
-  uint32_t GetPreferredBitrateBps(uint32_t framerate) override;
-
- private:
-  const VideoCodec codec_;
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_VIDEO_CODING_UTILITY_DEFAULT_VIDEO_BITRATE_ALLOCATOR_H_