rgw: cleanup old code and remove systemd condition
rgw: cleanup old code and remove systemd condition

Remove the old check prior systemd.
We only support systemd so there is no need to run a condition on
systemd. The playbook will fail if systemd is not present.

Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

bengland2/ceph-ansible,bengland2/ceph-ansible,ceph/ceph-ansible,fgal/ceph-ansible,travmi/ceph-ansible,fgal/ceph-ansible,font/ceph-ansible,jtaleric/ceph-ansible,font/ceph-ansible,ceph/ceph-ansible,travmi/ceph-ansible,jtaleric/ceph-ansible