Revert "fix(abstractitiltarget): set priority from urgency and impact (#3178)"

This reverts commit 1269edd.

Author: btry

inc/abstractitiltarget.class.php

@@ -428,7 +428,6 @@ protected function setTargetUrgency($data, $formanswer) {
       }
       if (!is_null($urgency) && $urgency != 0) {
          $data['urgency'] = $urgency;
-         $data['priority'] = CommonITILObject::computePriority($data['urgency'], $data['impact']);;
       }
 
       return $data;