[cloudkitty] Remove unused option from configuration file template

The unused "services" option has been removed from the [collect] section.

Change-Id: Id99fc99e1dff2b8f953b242abda2174cbbecd11d

ansible/roles/cloudkitty/templates/cloudkitty.conf.j2

@@ -39,7 +39,6 @@ policy_file = {{ cloudkitty_policy_file }}
 
 [collect]
 collector = {{ cloudkitty_collector_backend }}
-services = compute,image{% if enable_cinder | bool %},volume{% endif %},network.bw.out,network.bw.in,network.floating
 {% if cloudkitty_custom_metrics_used %}
 metrics_conf = /etc/cloudkitty/{{ cloudkitty_custom_metrics_yaml_file }}
 {% endif %}