staging: comedi: ni_daq_700: Remove unused variables from the boardinfo

The 'read_byte' and 'write_byte' function pointers in the boardinfo
struct are not referenced in the driver. Just remove them.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/ni_daq_700.c

@@ -62,10 +62,6 @@ struct dio700_board {
 	int device_id;		/*  device id for pcmcia board */
 	enum dio700_bustype bustype;	/*  PCMCIA */
 	int have_dio;		/*  have daqcard-700 dio */
-	/*  function pointers so we can use inb/outb or readb/writeb */
-	/*  as appropriate */
-	unsigned int (*read_byte) (unsigned int address);
-	void (*write_byte) (unsigned int byte, unsigned int address);
 };
 
 static const struct dio700_board dio700_boards[] = {