Revert of Adding BitrateController to audio network adaptor.

webrtc/modules/audio_coding/audio_network_adaptor/bitrate_controller.h

Index: webrtc/modules/audio_coding/audio_network_adaptor/bitrate_controller.h
diff --git a/webrtc/modules/audio_coding/audio_network_adaptor/bitrate_controller.h b/webrtc/modules/audio_coding/audio_network_adaptor/bitrate_controller.h
deleted file mode 100644
index cfc6fa805816cd5c8eb61440fca35fee086d7377..0000000000000000000000000000000000000000
--- a/webrtc/modules/audio_coding/audio_network_adaptor/bitrate_controller.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- *  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_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_BITRATE_CONTROLLER_H_
-#define WEBRTC_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_BITRATE_CONTROLLER_H_
-
-#include "webrtc/base/constructormagic.h"
-#include "webrtc/modules/audio_coding/audio_network_adaptor/controller.h"
-
-namespace webrtc {
-
-class BitrateController final : public Controller {
- public:
-  struct Config {
-    Config(int initial_bitrate_bps, int frame_length_ms);
-    ~Config();
-    int initial_bitrate_bps;
-    int initial_frame_length_ms;
-  };
-
-  explicit BitrateController(const Config& config);
-
-  void MakeDecision(const NetworkMetrics& metrics,
-                    AudioNetworkAdaptor::EncoderRuntimeConfig* config) override;
-
- private:
-  const Config config_;
-  int bitrate_bps_;
-  int overhead_rate_bps_;
-  RTC_DISALLOW_COPY_AND_ASSIGN(BitrateController);
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_BITRATE_CONTROLLER_H_