Bug 16769: [QA Follow-up] Remove unsupported deepcopy parameter

Bug 16769: [QA Follow-up] Remove unsupported deepcopy parameter

Routine C4/Koha/GetAuthorisedValues adds deepcopy => 1 to the options of
set_in_cache. This makes no sense (anymore?). Is not supported or passed
further. So better remove it.

Test plan:
Run t/db_dependent/Koha.t (with Test::Deep available to minimize confusion)

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>