Bug 24546: Fix intentions of build_sample_item in Club/Hold.t

Bug 24546: Fix intentions of build_sample_item in Club/Hold.t

In t/db_dependent/Koha/Club/Hold.t:
my $item1 = $builder->build_sample_item({ branchcode => $library->branchcode });
my $item2 = $builder->build_sample_item({ branchcode => $library->branchcode });

build_sample_item takes either "library" or the item's attributes.
branchcode is not part of the item's table, so what those 2 lines are trying to acchieve is wrong.

Test plan:
 % prove t/db_dependent/Koha/Club/Hold.t
must return green before and after this patch

Note that this patch also remove an uneeded debugging statement.

This has been caught by bug 24363.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>