staging:iio:adc:ad7606 remove unused chip info elements.

These are now handled through the chan_spec arrays and no one
is using them anymore.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/adc/ad7606.h

@@ -50,8 +50,6 @@ struct ad7606_platform_data {
 
 struct ad7606_chip_info {
 	const char			*name;
-	u8				bits;
-	char				sign;
 	u16				int_vref_mv;
 	struct iio_chan_spec		*channels;
 	unsigned			num_channels;