B&R: Remove unnecessary privilege escalation

The whole role gets privilege escalation, no need to do it
one more time for wipe_ceph_osds.

Change-Id: Ib2a6b90934c1f8ac0178e2bf0e7af9203d00751c
Closes-Bug: 1847336
Signed-off-by: Ovidiu Poncea <ovidiu.poncea@windriver.com>

playbookconfig/src/playbooks/roles/bootstrap/validate-config/tasks/main.yml

@@ -623,8 +623,6 @@
   - name: Wipe ceph osds
     script: wipe_osds.sh
     register: results
-    become: yes
-    become_user: root
 
   - name: Result of wiping ceph osds
     debug: var=results.stdout_lines