Delete the deprecated option from the group "DEFAULT"

more infomation, see http://paste.openstack.org/show/603369/

Change-Id: If803071bfa88b8e5275b3291c05dc3a9f6e08222
Closes-Bug: #1674215

ansible/roles/cinder/templates/cinder.conf.j2

@@ -14,7 +14,6 @@ volume_name_template = volume-%s
 glance_api_servers = {% for host in groups['glance-api'] %}{{ internal_protocol }}://{% if orchestration_engine == 'KUBERNETES' %}glance-api{% else %}{{ hostvars[host]['ansible_' + hostvars[host]['api_interface']]['ipv4']['address'] }}{% endif %}:{{ glance_api_port }}{% if not loop.last %},{% endif %}{% endfor %}
 
 glance_num_retries = {{ groups['glance-api'] | length }}
-glance_api_version = 2
 
 os_region_name = {{ openstack_region_name }}