staging: comedi: cb_das16_cs: remove unused variable in private data

The 'link' variable in the private data struct is not used by the
driver. Remove it.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/cb_das16_cs.c

@@ -83,8 +83,6 @@ static const struct das16cs_board das16cs_boards[] = {
 };
 
 struct das16cs_private {
-	struct pcmcia_device *link;
-
 	unsigned int ao_readback[2];
 	unsigned short status1;
 	unsigned short status2;