removed rootwrap_config

Author: klgill

docs_user/modules/proc_adopting-image-service-with-block-storage-backend.adoc

@@ -15,7 +15,6 @@ spec
           [glance_store]
           default_backend = default_backend
           [default_backend]
-          rootwrap_config = /etc/glance/rootwrap.conf
           description = Default cinder backend
           cinder_store_auth_address = {{ .KeystoneInternalURL }}
           cinder_store_user_name = {{ .ServiceUser }}
@@ -50,7 +49,6 @@ spec:
         [glance_store]
         default_backend = default_backend
         [default_backend]
-        rootwrap_config = /etc/glance/rootwrap.conf
         description = Default cinder backend
         cinder_store_auth_address = {{ .KeystoneInternalURL }}
         cinder_store_user_name = {{ .ServiceUser }}