Enable barbican jobs  to run on ubuntu focal

This is fixed by https://review.opendev.org/#/c/753699/4
SO removing the TODO to anable to run the job on ubuntu focal.

Change-Id: Idce913345c1bf8a47e678d706364c09837221a82
diff --git a/.zuul.yaml b/.zuul.yaml
index 2a04353..6f0ce48 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -23,12 +23,6 @@
     description: |
       This is a base job for lvm with lio & tgt targets
     parent: devstack-tempest
-    # TODO(gmann): Remove the below nodeset setting to Bionic once
-    # https://storyboard.openstack.org/#!/story/2007732 is fixed
-    # Once nodeset is removed form here then devstack-tempest job
-    # will automatically run this job on Ubuntu Focal nodeset from
-    # Victoria gate onwards.
-    nodeset: openstack-single-node-bionic
     timeout: 10800
     roles:
       - zuul: opendev.org/openstack/cinderlib