Removes unused WaveOut APIs from ADM

webrtc/modules/audio_device/linux/audio_device_alsa_linux.h

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 65 matching lines @@
     int32_t StopPlayout() override;
     bool Playing() const override;
     int32_t StartRecording() override;
     int32_t StopRecording() override;
     bool Recording() const override;
 
     // Microphone Automatic Gain Control (AGC)
     int32_t SetAGC(bool enable) override;
     bool AGC() const override;
 
-    // Volume control based on the Windows Wave API (Windows only)
-    int32_t SetWaveOutVolume(uint16_t volumeLeft,
-                             uint16_t volumeRight) override;
-    int32_t WaveOutVolume(uint16_t& volumeLeft,
-                          uint16_t& volumeRight) const override;
-
     // Audio mixer initialization
     int32_t InitSpeaker() override;
     bool SpeakerIsInitialized() const override;
     int32_t InitMicrophone() override;
     bool MicrophoneIsInitialized() const override;
 
     // Speaker volume controls
     int32_t SpeakerVolumeIsAvailable(bool& available) override;
     int32_t SetSpeakerVolume(uint32_t volume) override;
     int32_t SpeakerVolume(uint32_t& volume) const override;
@@ skipping 136 matching lines @@
 
     char _oldKeyState[32];
 #if defined(USE_X11)
     Display* _XDisplay;
 #endif
 };
 
 }
 
 #endif  // MODULES_AUDIO_DEVICE_MAIN_SOURCE_LINUX_AUDIO_DEVICE_ALSA_LINUX_H_