Bug 31095: Remove GetDebarments from MarkIssueReturned.t

Bug 31095: Remove GetDebarments from MarkIssueReturned.t

This patch removes GetDebarments from Ciculation/MarkIssueReturned.t

Test plan
1. Confirm t/db_dependent/Circulation/MarkIssueReturned.t passes prior
   to the patch
2. Confirm t/db_dependent/Circulation/MarkIssueReturned.t passes after
   the patch
3. Confirm no tests have been removed

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>