Remove unneeded .kitchen.yml attributes so we get collectd from SG repo.
Remove unneeded .kitchen.yml attributes so we get collectd from SG repo.

partkyle/chef-collectd,partkyle/chef-collectd,partkyle/chef-collectd,sendgrid-ops/chef-collectd,sendgrid-ops/chef-collectd,sendgrid-ops/chef-collectd