staging:iio:dummy: Remove outdated comment

iio_device_free has to be called regardless of whether the device has been
registered or not when freeing it.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/iio_simple_dummy.c

@@ -470,8 +470,6 @@ static int __devinit iio_dummy_probe(int index)
 error_unregister_events:
 	iio_simple_dummy_events_unregister(indio_dev);
 error_free_device:
-	/* Note free device should only be called, before registration
-	 * has succeeded. */
 	iio_device_free(indio_dev);
 error_ret:
 	return ret;