staging: comedi: adl_pci6208: remove unused variable in the private data

The 'data' 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>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/adl_pci6208.c

@@ -71,7 +71,6 @@ static const struct pci6208_board pci6208_boards[] = {
 };
 
 struct pci6208_private {
-	int data;
 	struct pci_dev *pci_dev;
 	unsigned int ao_readback[2];
 };