staging: comedi: acl7225b: dev->irq is already '0'

This driver does not use interrupts and the dev->irq variable is
already set to '0' when then (*attach) function is called. Setting
it in the driver is unnecessary.
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/acl7225b.c

@@ -76,7 +76,6 @@ static int acl7225b_attach(struct comedi_device *dev,
 	if (!request_region(iobase, board->io_range, dev->board_name))
 		return -EIO;
 	dev->iobase = iobase;
-	dev->irq = 0;
 
 	ret = comedi_alloc_subdevices(dev, 3);
 	if (ret)