Bug 31112: Remove unnecessary if-clause

Bug 31112: Remove unnecessary if-clause

To test:
 1) Please check manually that the logic stays the same, use git's -w command line parameter to
    ignore whitespace changes in the diff output.
 2) prove t/db_dependent/Circulation.t

Signed-off-by: Sally <sally.healey@cheshiresharedservices.gov.uk>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 8ba1a9a5345310c54d9225049d470544b56eeb11)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>