Bug 33164: Do not prevent processing of all error messages
This follow-up patch removes the use of $exit_required_p completely. The sysprefs BlockReturnOfLostItems and BlockReturnOfWithdrawnItems are handled in other scripts, and should not prevent the processing of all returns error messages when enabled.
Signed-off-by: Phil Ringnalda <phil@chetcolibrary.org> Signed-off-by: Emily Lamancusa <emily.lamancusa@montgomerycountymd.gov> Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>