Delete unused BluetoothAudioSink code.

device/bluetooth/bluetooth_audio_sink.cc

-// Copyright 2014 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_audio_sink.h"
-
-namespace {
-
-// SBC codec(0x00) is the mandatory codec for A2DP audio sink.
-// |capabilities| includes the mandatory support for A2DP audio sink.
-// [Octet0]: 0x3f
-//   Sampling frequency [0 0 1 1]: supports 44100 Hz and 48000 Hz.
-//   Channel mode [1 1 1 1]: supports Mono, Dual Channel, Stereo, and Joint
-//                           Stereo.
-// [Octet1]: 0xff
-//    Block length [1, 1, 1, 1]: supports block length of 4, 8, 12 and 16.
-//    Subbands [1, 1]: supports 4 and 8 subbands.
-//    Allocation Method [1, 1]: supports SNR and Loudness.
-// [Octet2]: 0x12
-//    Minimum bitpool value: 18 is the bitpool value for Mono.
-// [Octet3]: 0x35
-//    Maximum bitpool value: 53 is the bitpool value for Joint Stereo.
-  const uint8_t kDefaultCodec = 0x00;
-  const uint8_t kDefaultCapabilities[] = {0x3f, 0xff, 0x12, 0x35};
-
-}  // namespace
-
-namespace device {
-
-// static
-const uint16_t BluetoothAudioSink::kInvalidVolume = 128;
-
-BluetoothAudioSink::Options::Options() : codec(kDefaultCodec) {
-  capabilities.assign(kDefaultCapabilities,
-                      kDefaultCapabilities + sizeof(kDefaultCapabilities));
-}
-
-BluetoothAudioSink::Options::~Options() {
-}
-
-BluetoothAudioSink::BluetoothAudioSink() {
-}
-
-BluetoothAudioSink::~BluetoothAudioSink() {
-}
-
-}  // namespace device