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 <seb@redhat.com>

roles/ceph-rgw/tasks/start_radosgw.yml

@@ -1,18 +1,10 @@
 ---
-- name: check if rgw is started
-  command: /etc/init.d/radosgw status
-  register: rgwstatus
-  changed_when: false
-  failed_when: false
-  always_run: true
-
 - name: ensure systemd service override directory exists
   file:
     state: directory
     path: "/etc/systemd/system/ceph-rgw@.service.d/"
   when:
     - ceph_rgw_systemd_overrides is defined
-    - ansible_service_mgr == 'systemd'
 
 - name: add ceph-rgw systemd service overrides
   config_template:
@@ -22,7 +14,6 @@
     config_type: "ini"
   when:
     - ceph_rgw_systemd_overrides is defined
-    - ansible_service_mgr == 'systemd'
 
 - name: start rgw
   service: