If they are no longer required you may just delete these certs, though deleting Callmanager-trust certs may trigger phone resets due to some old bugs dealing with ITL cert updates, hence do it during scheduled window. If you need this trust then you need to upload new valid certs and delete these. You can alternatively keep these there if you don't need them as they don't cause any adverse impact, but it's a good idea not to have expired certs.
