remove
If the SyncMediaPlayer has an active playback range, it will be removed, and the engine event OnSyncMediaRangeEventListener.onPlaybackRangeRemoved will be emitted by the reading system. The event object's reason property will be set to SyncMediaRangePlaybackRemoveReason.APP_GENERATED.
This method has no effect if the SyncMediaPlayer don't have an active playback range.