Comment 2 for bug 1274053

You can also change the cinder rule for deletion to read as "[]" instead of the default rule, which performs a admin_or_owner check.

https://github.com/openstack/horizon/blob/master/openstack_dashboard/conf/cinder_policy.json#L10

I'm not marking the bug as invalid because I wonder if we may want to change that rule back - it is a surprising change. I think it might not be matching the cinder policy either - volume:delete is not defined at https://github.com/openstack/cinder/blob/master/etc/cinder/policy.json which seems to mean [] implicitly.