staging:iio:ad5933: Don't enable channels by default

The convention for IIO devices is that all channels are disabled by default.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/staging/iio/impedance-analyzer/ad5933.c

@@ -757,10 +757,6 @@ static int ad5933_probe(struct i2c_client *client,
 	if (ret)
 		goto error_unreg_ring;
 
-	/* enable both REAL and IMAG channels by default */
-	iio_scan_mask_set(indio_dev, indio_dev->buffer, 0);
-	iio_scan_mask_set(indio_dev, indio_dev->buffer, 1);
-
 	ret = ad5933_setup(st);
 	if (ret)
 		goto error_uninitialize_ring;