The audio alert feature is not correctly designed and is problematic.
It looks at the class name in the DOM, not when the element with this class name
will be displayed to the end user
So it's not possible to make it work for modals for instance, or if an element
is built in JS then displayed
This patch remove the modal code from the code, if there are no waiting
holds. It is the behaviour that existed prior to the Bootstrap update.
However it is kind of random behaviour, the song that is played when the
librarian open the circ page is different if the user has waiting holds or not.
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com> Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>