Revert "Explicitly set rabbit flags for MN-CI upgrades"

This reverts commit 901c0c2.

This is not required in Caracal.

Author: markgoddard

etc/kayobe/environments/ci-multinode/kolla/globals.yml

@@ -61,10 +61,3 @@ designate_ns_record:
 designate_backend: "bind9"
 designate_recursion: "yes"
 designate_forwarders_addresses: "1.1.1.1; 8.8.8.8"
-
-############################################################################
-# RabbitMQ
-
-# Ensure Rabbit is deployed with HA rather than quorum queues (to test migrations)
-om_enable_rabbitmq_high_availability: true
-om_enable_rabbitmq_quorum_queues: false