Resolve DEICH-6039 Delete code related to unused notice templates
Removes a bit of code which enables us to safely delete som unused templates.
When merged, the following templates can be deleted from the DB:
DELETE FROM letter WHERE code IN (
'OVERDUES_SLIP',
'HOLD',
'DISCHARGE',
'ODUE',
'OPAC_REG_VERIFY',
'ACQORDER',
'RLIST',
'RENEWAL',
'AUTO_RENEWALS',
'CHECKOUT',
'CHECKOUT_NOTE'
);
Closes DEICH-6039
Edited by Petter Goksøyr Åsen