Fix for minbias tests in TrigInDetValidation ART
Remove art-input for minbias jobs. This data is on cvmfs and this art directive causes the job to crash.
modified: Trigger/TrigValidation/TrigInDetValidation/test/test_trigID_minbias.py
modified: Trigger/TrigValidation/TrigInDetValidation/test/test_trigID_minbias_mt.py