Remove restart method from VideoTrackSourceInterface.

webrtc/api/androidvideotracksource.h

Index: webrtc/api/androidvideotracksource.h
diff --git a/webrtc/api/androidvideotracksource.h b/webrtc/api/androidvideotracksource.h
index a615b26b0682992fe499c7963f2ea8bc3dc6721b..79d0df2b0b435bdaef9127bd4247e158d5efc55e 100644
--- a/webrtc/api/androidvideotracksource.h
+++ b/webrtc/api/androidvideotracksource.h
@@ -37,9 +37,6 @@ class AndroidVideoTrackSource : public Notifier<VideoTrackSourceInterface> {
   // Not used on Android.
   // TODO(sakal/magjed): Try to remove this from the interface.
   void Stop() override { RTC_NOTREACHED(); };
-  // Not used on Android.
-  // TODO(sakal/magjed): Try to remove this from the interface.
-  void Restart() override { RTC_NOTREACHED(); }
 
   bool is_screencast() const override { return is_screencast_; }