Remove stop 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 79d0df2b0b435bdaef9127bd4247e158d5efc55e..2bbecc82c9480a8d752a62b0663f95192cfdda71 100644
--- a/webrtc/api/androidvideotracksource.h
+++ b/webrtc/api/androidvideotracksource.h
@@ -34,10 +34,6 @@ class AndroidVideoTrackSource : public Notifier<VideoTrackSourceInterface> {
                           jobject j_egl_context,
                           bool is_screencast = false);
 
-  // Not used on Android.
-  // TODO(sakal/magjed): Try to remove this from the interface.
-  void Stop() override { RTC_NOTREACHED(); };
-
   bool is_screencast() const override { return is_screencast_; }
 
   // Indicates that the encoder should denoise video before encoding it.