mergify: remove merge on skip ci
mergify: remove merge on skip ci

This rule will probably never be applyied and at the moment this is
creating a cancelled job in the CI status.

Signed-off-by: Dimitri Savineau <a50a620e679eed14f4e99998b821cea8884cf228@redhat.com>

ceph/ceph-ansible,ceph/ceph-ansible