Remove geo_bulk_notifier_cron
In gitlab-org/gitlab-ee!2644 the use of System Hooks is removed for GitLab Geo. So there no longer needs to be a cron job that notifies secondary nodes.
In gitlab-org/gitlab-ee!2644 the use of System Hooks is removed for GitLab Geo. So there no longer needs to be a cron job that notifies secondary nodes.