Remove leftover of pankoclient
Remove leftover of pankoclient

This change removes reference to pankoclient which was left when
removing pankoclient[1].

[1] 0d0067a51a13f1e084255851328a872fbc10df3c

Change-Id: I6fb2243b64ff457a5c338d7e510acfdbf65f5585

openstack/tripleo-puppet-elements,openstack/tripleo-puppet-elements