Bug 31313: (QA follow-up) Remove unused bundle_host field from item_info

Bug 31313: (QA follow-up) Remove unused bundle_host field from item_info

The patch "Bug 31313: Fix availability - OPAC
opac-detail" (70cb4e22c07) lead to
koha-tmpl/opac-tmpl/bootstrap/en/includes/item-status.inc
use the bundle_host method directly through the passed
Koha::Item object, thus the bundle_host field added by
this script is unused.

Signed-off-by: Joonas Kylmälä <joonas.kylmala@iki.fi>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>