remove the task to validate docker login, leave rdo
remove the task to validate docker login, leave rdo

IIRC we don't have to log into docker.io to push
or pull.  This is working fine w/ rdo-project atm btw.
Removing until we can confirm.

Change-Id: I13e530126fb1b8ebb98e6356fc897a974c015440

redhat-openstack/rdo-infra,rdo-infra/ci-config,rdo-infra/ci-config,rdo-infra/ci-config,redhat-openstack/rdo-infra,rdo-infra/ci-config,redhat-openstack/rdo-infra,redhat-openstack/rdo-infra