Removes unused WaveOut APIs from ADM

webrtc/modules/audio_device/dummy/audio_device_dummy.h

Index: webrtc/modules/audio_device/dummy/audio_device_dummy.h
diff --git a/webrtc/modules/audio_device/dummy/audio_device_dummy.h b/webrtc/modules/audio_device/dummy/audio_device_dummy.h
index 72a0eb1ac94cd04d5ce1f21de5a44392706176df..fd9a915ac43b03b0fd17d0cff20e01bf21c983a9 100644
--- a/webrtc/modules/audio_device/dummy/audio_device_dummy.h
+++ b/webrtc/modules/audio_device/dummy/audio_device_dummy.h
@@ -69,11 +69,6 @@ class AudioDeviceDummy : public AudioDeviceGeneric {
   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;