Remove unneeded condition
Remove unneeded condition

If an invalid interval ID is given to "clearInterval()" the function
does nothing, so there is no need to check it beforehand.

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

nextcloud/spreed,nextcloud/spreed,nextcloud/spreed