staging: comedi: dyna_pci10xx: remove 'valid' from the private data

This variable is set at the end of the attach but never used
in the driver. Remove it.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/dyna_pci10xx.c

@@ -101,7 +101,6 @@ static const struct boardtype boardtypes[] = {
 
 struct dyna_pci10xx_private {
 	struct pci_dev *pci_dev;	/*  ptr to PCI device */
-	char valid;			/*  card is usable */
 	struct mutex mutex;
 
 	/* device base address registers */
@@ -342,8 +341,6 @@ static int dyna_pci10xx_attach(struct comedi_device *dev,
 	s->state = 0;
 	s->insn_bits = dyna_pci10xx_do_insn_bits;
 
-	devpriv->valid = 1;
-
 	printk(KERN_INFO "comedi: dyna_pci10xx: %s - device setup completed!\n",
 		thisboard->name);