Revert of Add groupid for media devices. Group audio devices.

media/audio/mock_audio_manager.h

Index: media/audio/mock_audio_manager.h
diff --git a/media/audio/mock_audio_manager.h b/media/audio/mock_audio_manager.h
index e77e85c5ab30c424022cb8bafae546ca73946159..6b3994c0462556b33aec1eb119e98e024923b6bc 100644
--- a/media/audio/mock_audio_manager.h
+++ b/media/audio/mock_audio_manager.h
@@ -56,8 +56,6 @@
       const std::string& device_id) override;
   std::string GetAssociatedOutputDeviceID(
       const std::string& input_device_id) override;
-  std::string GetGroupIDOutput(const std::string& output_id) override;
-  std::string GetGroupIDInput(const std::string& input_id) override;
 
   std::unique_ptr<AudioLog> CreateAudioLog(
       AudioLogFactory::AudioComponent component) override;