Fix default options for ironic cinder driver

Drop not needed url parameter

Change-Id: Ia0bac1e05bf4091d0368d31d303d241b880a9ff6
diff --git a/ironic/conductor/storage/cinder.yml b/ironic/conductor/storage/cinder.yml
index d3b60b1..17f23e5 100644
--- a/ironic/conductor/storage/cinder.yml
+++ b/ironic/conductor/storage/cinder.yml
@@ -7,6 +7,5 @@
         password: ${_param:keystone_cinder_password}
         project_domain_id: default
         project_name: service
-        url: ${_param:cinder_service_protocol}://${_param:cinder_service_host}:8776
         user_domain_name: Default
         username: cinder