[CI] Remove an old override

Since [1] we are not running keepalived directly on CI network,
and are therefore safeguarded against such collisions.

[1] 8e40629161

Change-Id: Ie25b2d6d48f10c6b295795b3c82c1f8a213f2a8c

tests/templates/globals-default.j2

@@ -19,10 +19,6 @@ docker_custom_config:
 distro_python_version: "{{ kolla_python_version }}"
 {% endif %}
 
-# Use a random router id, otherwise it may result in the same router id
-# in the CI gate.
-keepalived_virtual_router_id: "{{ 250 | random(1) }}"
-
 # MariaDB/Galera - fine tune gmcast.peer_timeout
 mariadb_wsrep_extra_provider_options:
   - "gmcast.peer_timeout=PT15S"