Remove enabled/set_enabled from DemuxerStream interface

media/mojo/services/mojo_demuxer_stream_adapter.cc

Index: media/mojo/services/mojo_demuxer_stream_adapter.cc
diff --git a/media/mojo/services/mojo_demuxer_stream_adapter.cc b/media/mojo/services/mojo_demuxer_stream_adapter.cc
index c54f1f4243232d423d8a21ef48d04a7f50bfa225..17a73eb12ce40321bacbc04be5e2844c99c31cd6 100644
--- a/media/mojo/services/mojo_demuxer_stream_adapter.cc
+++ b/media/mojo/services/mojo_demuxer_stream_adapter.cc
@@ -70,15 +70,6 @@ VideoRotation MojoDemuxerStreamAdapter::video_rotation() {
   return VIDEO_ROTATION_0;
 }
 
-bool MojoDemuxerStreamAdapter::enabled() const {
-  return true;
-}
-
-void MojoDemuxerStreamAdapter::set_enabled(bool enabled,
-                                           base::TimeDelta timestamp) {
-  NOTIMPLEMENTED();
-}
-
 // TODO(xhwang): Pass liveness here.
 void MojoDemuxerStreamAdapter::OnStreamReady(
     Type type,