Delete unused BluetoothAudioSink code.

device/bluetooth/bluetooth_adapter_win.cc

 // Copyright (c) 2012 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.
 
 #include "device/bluetooth/bluetooth_adapter_win.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 
@@ skipping 168 matching lines @@
 
 void BluetoothAdapterWin::CreateL2capService(
     const BluetoothUUID& uuid,
     const ServiceOptions& options,
     const CreateServiceCallback& callback,
     const CreateServiceErrorCallback& error_callback) {
   // TODO(keybuk): implement.
   NOTIMPLEMENTED();
 }
 
-void BluetoothAdapterWin::RegisterAudioSink(
-    const BluetoothAudioSink::Options& options,
-    const AcquiredCallback& callback,
-    const BluetoothAudioSink::ErrorCallback& error_callback) {
-  NOTIMPLEMENTED();
-  error_callback.Run(BluetoothAudioSink::ERROR_UNSUPPORTED_PLATFORM);
-}
-
 void BluetoothAdapterWin::RegisterAdvertisement(
     std::unique_ptr<BluetoothAdvertisement::Data> advertisement_data,
     const CreateAdvertisementCallback& callback,
     const AdvertisementErrorCallback& error_callback) {
   NOTIMPLEMENTED();
   error_callback.Run(BluetoothAdvertisement::ERROR_UNSUPPORTED_PLATFORM);
 }
 
 BluetoothLocalGattService* BluetoothAdapterWin::GetGattService(
     const std::string& identifier) const {
@@ skipping 181 matching lines @@
     num_discovery_listeners_ -= on_stop_discovery_callbacks_.size();
     on_stop_discovery_callbacks_.clear();
     return;
   }
 
   discovery_status_ = DISCOVERY_STOPPING;
   task_manager_->PostStopDiscoveryTask();
 }
 
 }  // namespace device