fdo#39956 Delete JAB

JAB has been discontinued in favor of the native IA2 bridge.

Change-Id: I88461f73c620507d3e97b077ea2abdd2229322e1
Reviewed-on: https://gerrit.libreoffice.org/6819
Reviewed-by: David Ostrovsky <David.Ostrovsky@gmx.de>
Tested-by: David Ostrovsky <David.Ostrovsky@gmx.de>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Reviewed-by: Michael Stahl <mstahl@redhat.com>