fix(tracks): remove mute and videotype listeners on track remove

Listeners were set for when a track muted or changed its video
type, but the listeners were never removed. This would could
cause events to keep firing on the removed tracks, which would
cause redux to fire and error because the tracks were no longer
known. That the tracks still fire events after removal is
another issue...

react/features/base/tracks/actions.js

  * @returns {{ type: TRACK_REMOVED, track: Track }}
  */
 export function trackRemoved(track) {
+    track.removeAllListeners(JitsiTrackEvents.TRACK_MUTE_CHANGED);
+    track.removeAllListeners(JitsiTrackEvents.TRACK_VIDEOTYPE_CHANGED);
+
     return {
         type: TRACK_REMOVED,
         track: {