Bug 19317: (bug 18966 follow-up) Remove leftover

Bug 19317: (bug 18966 follow-up) Remove leftover

Nothing important here, but this line should have been removed by bug
18966:

2177         # Update the fines
2178         $dbh->do(q|UPDATE accountlines SET issue_id = ? WHERE
issue_id = ?|, undef, $old_checkout->issue_id, $issue->issue_id);

The issue_id is now the same when moved from issues to old_issues. We do
not need to update the accountlines table.

No test plan here, you need to understand previous changes to validate
this patch.

Signed-off-by: Colin Campbell <colin.campbell@ptfs-europe.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>