setup_nova_compute: remove workaround (no longer needed)

Change-Id: I912e20c83aa3a048c8fe6d1ea9bd0dd21652bacd

labs/osbash/scripts/ubuntu/setup_nova_compute.sh

@@ -142,24 +142,4 @@ openstack image list
 
 echo "Checking the cells and placement API are working successfully."
 echo "on controller node: nova-status upgrade check"
-rc=0
-node_ssh controller "sudo nova-status upgrade check" || rc=$?
-if [ $rc -eq 1 ]; then
-    cat << EXPLAIN
-nova-status upgrade check returned $rc. We ignore this error because starting
-with OpenStack Rocky, we get an erroneous warning like this:
-
-  Check: Resource Providers
-  Result: Warning
-  Details: There are no compute resource providers in the Placement
-    service but there are 1 compute nodes in the deployment.
-    This means no compute nodes are reporting into the
-    Placement service and need to be upgraded and/or fixed.
-    See
-    https://docs.openstack.org/nova/latest/user/placement.html
-    for more details.
-
-The ability of the training cluster to allocate resources and launch
-VMs is not affected by this.
-EXPLAIN
-fi
+node_ssh controller "sudo nova-status upgrade check"