Remove unused variable MAX_NUMBER
Remove unused variable MAX_NUMBER

This variable won't be used by Kolla Ansible once change
Ia786d037f5484f18294188639c956d4ed5ffbc2a is merged.

Change-Id: I600e24896e74496f05387183c10d6c8c6bbbb17b
Depends-On: https://review.opendev.org/735617

stackforge/kolla,stackforge/kolla,stackforge/kolla,openstack/kolla,openstack/kolla