Revert of Add support for the audio-output-device switching IPC mechanism to the renderer lower...

media/audio/clockless_audio_sink.cc

Index: media/audio/clockless_audio_sink.cc
diff --git a/media/audio/clockless_audio_sink.cc b/media/audio/clockless_audio_sink.cc
index 60c839c124b210c682f9cf5fd724881075ff12bb..44e9adb4451f0c609e5db94f77a7b87c6e860f64 100644
--- a/media/audio/clockless_audio_sink.cc
+++ b/media/audio/clockless_audio_sink.cc
@@ -4,9 +4,6 @@
 
 #include "media/audio/clockless_audio_sink.h"
 
-#include "base/bind.h"
-#include "base/location.h"
-#include "base/single_thread_task_runner.h"
 #include "base/threading/simple_thread.h"
 
 namespace media {
@@ -108,11 +105,4 @@
   return volume == 0.0;
 }
 
-void ClocklessAudioSink::SwitchOutputDevice(
-    const std::string& device_id,
-    const GURL& security_origin,
-    const SwitchOutputDeviceCB& callback) {
-  callback.Run(SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_SUPPORTED);
-}
-
 }  // namespace media