Removes unused WaveOut APIs from ADM

webrtc/modules/audio_device/dummy/file_audio_device.h

Index: webrtc/modules/audio_device/dummy/file_audio_device.h
diff --git a/webrtc/modules/audio_device/dummy/file_audio_device.h b/webrtc/modules/audio_device/dummy/file_audio_device.h
index 160ba1b2e097358b08edaf90a663502e43fbae48..63e7e79221fa008493332dfb103dcdb35797eae3 100644
--- a/webrtc/modules/audio_device/dummy/file_audio_device.h
+++ b/webrtc/modules/audio_device/dummy/file_audio_device.h
@@ -90,11 +90,6 @@ class FileAudioDevice : 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;