Bug 27600: Remove password check from `add_hold`

Bug 27600: Remove password check from `add_hold`

As suggested in the bugzilla comments, the add_hold method also
doesn't require the password checking code.

Test plan
1/ Run t/db_dependent/SIP/ILS.t and watch it pass

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit bc72a6d508f1ce93ba190153966c1c9667414e48)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>