iio: dac: ltc2632: remove some unused defines

These two defines are unused since the driver was introduced in commit
02b829f9 ("iio: dac: Add support for ltc2632 DACs").
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/dac/ltc2632.c

@@ -12,9 +12,6 @@
 #include <linux/iio/iio.h>
 #include <linux/regulator/consumer.h>
 
-#define LTC2632_ADDR_DAC0                       0x0
-#define LTC2632_ADDR_DAC1                       0x1
-
 #define LTC2632_CMD_WRITE_INPUT_N               0x0
 #define LTC2632_CMD_UPDATE_DAC_N                0x1
 #define LTC2632_CMD_WRITE_INPUT_N_UPDATE_ALL    0x2