Remove example manifest to use networking-cisco
Remove example manifest to use networking-cisco

... because the plugin is no longer supported[1].

[1] a6c4ba2c2b1b99e885813dc201c4608152d724da

Change-Id: I7ea03ae1fa6c65cea7138c71540aee1ca29fb3cb

openstack/puppet-neutron,openstack/puppet-neutron