Motown: Get rid of speculative clock definition

mojo/services/media/control/interfaces/media_sink.mojom

Index: mojo/services/media/control/interfaces/media_sink.mojom
diff --git a/mojo/services/media/control/interfaces/media_sink.mojom b/mojo/services/media/control/interfaces/media_sink.mojom
index fb7fbc820a2cf7cf6c29b62340ee6b919c6f276d..45268cce6dc8447d72cd89a3811a96e7e0926579 100644
--- a/mojo/services/media/control/interfaces/media_sink.mojom
+++ b/mojo/services/media/control/interfaces/media_sink.mojom
@@ -5,7 +5,6 @@
 [DartPackage="mojo_services"]
 module mojo.media;
 
-import "mojo/services/media/common/interfaces/media_clock.mojom";
 import "mojo/services/media/common/interfaces/media_common.mojom";
 import "mojo/services/media/common/interfaces/media_state.mojom";
 import "mojo/services/media/common/interfaces/media_transport.mojom";
@@ -22,15 +21,6 @@ interface MediaSink {
   // status immediately.
   const uint64 kInitialStatus = 0;
 
-  // Gets the clock disposition from the source.
-  GetClockDisposition() => (ClockDisposition clock_disposition);
-
-  // Gets a master clock if the sink can be master, null otherwise.
-  GetMasterClock(Clock& master_clock);
-
-  // Sets a master clock.
-  SetMasterClock(Clock? master_clock);
-
   // Gets the consumer for the stream to be delivered.
   GetConsumer(MediaConsumer& consumer);