You cannot disable aRational® ClearQuest® package for a record type after it has been applied to the type. However, you can use the following extension to disable audit trailing:
sub atCust_SuppressAuditTrailRecord {
my($session, $entity) = @_;
# return 0; # return 0 to enable AuditTrail (default)
return 1; # return 1 to disable AuditTrail }