Minor cleanup on tools/test-setup.sh
Minor cleanup on tools/test-setup.sh

Remove unused variable.
Fix comment nit.

This addresses a review comment in https://review.openstack.org/430069.

Change-Id: I47e75a68c7e97340dab8b51b9fab9ed2983061ef

mahak/cinder,j-griffith/cinder,j-griffith/cinder,phenoxim/cinder,Datera/cinder,eharney/cinder,Datera/cinder,mahak/cinder,openstack/cinder,phenoxim/cinder,eharney/cinder,openstack/cinder