staging: comedi: pcl711: remove unused private data members

Remove all the private data variables that are not used by the driver.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: NIan Abbott <abbotti@mev.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/pcl711.c

@@ -175,11 +175,7 @@ static const struct pcl711_board boardtypes[] = {
 };
 
 struct pcl711_private {
-
-	int board;
-	int adchan;
 	int ntrig;
-	int aip[8];
 	unsigned int ao_readback[2];
 	unsigned int divisor1;
 	unsigned int divisor2;