remove error message from setup_windows.ps1
remove error message from setup_windows.ps1

COURSES-1757 #resolved #time 1h
Removed error message from script about $oldDNSSuffix

joshsamuelson/pltraining-classroom,samuelson/pltraining-classroom,fnaard/pltraining-classroom,binford2k/pltraining-classroom,carthik/pltraining-classroom,joshsamuelson/pltraining-classroom,binford2k/pltraining-classroom,samuelson/pltraining-classroom,fnaard/pltraining-classroom,samuelson/pltraining-classroom,puppetlabs/pltraining-classroom,fnaard/pltraining-classroom,joshsamuelson/pltraining-classroom,puppetlabs/pltraining-classroom,carthik/pltraining-classroom,binford2k/pltraining-classroom,carthik/pltraining-classroom,puppetlabs/pltraining-classroom