Bug 28510: Remove marking of closed branches as 'disable_transfer'

Bug 28510: Remove marking of closed branches as 'disable_transfer'

We no longer need to act as if closed branches were marked as
disable_transfer. This allows us to clean up a nice bit of code.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Bug 28510: Remove unused variable

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>