staging: comedi: cb_pcidas: remove superfluous comment

The ao (*cancel) function does not need commented.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/cb_pcidas.c

@@ -1085,7 +1085,6 @@ static int cb_pcidas_ao_cmd(struct comedi_device *dev,
 	return 0;
 }
 
-/* cancel analog output command */
 static int cb_pcidas_ao_cancel(struct comedi_device *dev,
 			       struct comedi_subdevice *s)
 {