staging: comedi: comedidev.h: remove unused callbacks from comedi_subdevice

The 'do_lock' and 'do_unlock' callbacks are not used be any of the comedi
drivers or the comedi core. Just remove them.
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/comedidev.h

@@ -75,9 +75,6 @@ struct comedi_subdevice {
 			  struct comedi_cmd *);
 	int (*poll)(struct comedi_device *, struct comedi_subdevice *);
 	int (*cancel)(struct comedi_device *, struct comedi_subdevice *);
-	/* int (*do_lock)(struct comedi_device *, struct comedi_subdevice *); */
-	/* int (*do_unlock)(struct comedi_device *, \
-			struct comedi_subdevice *); */
 
 	/* called when the buffer changes */
 	int (*buf_change)(struct comedi_device *dev,