Drop nodejs4 job
Drop nodejs4 job

As Migration to bionic is completed or nodejs10 job running.
So we not required nodejs4 job anymore.

Depends-On: https://review.opendev.org/#/c/666493/

Change-Id: I5d27dc7faeeba2702f30ac09c184edd9e7dae697

openstack/ironic-ui,openstack/ironic-ui,openstack/ironic-ui,openstack/ironic-ui