Don't rate limit users if they don't have limits

opentrafficshaper/plugins/radius/radius.pm

@@ -245,14 +245,11 @@ sub server_read {
 		$trafficClass = 1;
 	}
 
-	# FIXME: NK - better way?
 	# If we don't have rate limits, short circuit
 	if (!defined($trafficLimitTx)) {
-		$trafficLimitTx = 1000;
 		return;
 	}
 	if (!defined($trafficLimitRx)) {
-		$trafficLimitRx = 200;
 		return;
 	}