Remove unneeded listener
Remove unneeded listener

No audio monitor is set up for local screens, so there will be no audio
monitor to stop when the local screen stops.

Signed-off-by: Daniel Calviño Sánchez <bd7629e975cc0e00ea7cda4ab6a120f2ee42ac1b@gmail.com>

nextcloud/spreed,nextcloud/spreed,nextcloud/spreed