iio: xilinx-xadc: Remove unused variable

'offset’ is not used in the function. Remove it.
Signed-off-by: NSachin Kamat <sachin.kamat@samsung.com>
Acked-by: NLars-Peter Clausen <lars@metafoo.de>
Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

drivers/iio/adc/xilinx-xadc-events.c

@@ -31,17 +31,11 @@ static const struct iio_chan_spec *xadc_event_to_channel(
 static void xadc_handle_event(struct iio_dev *indio_dev, unsigned int event)
 {
 	const struct iio_chan_spec *chan;
-	unsigned int offset;
 
 	/* Temperature threshold error, we don't handle this yet */
 	if (event == 0)
 		return;
 
-	if (event < 4)
-		offset = event;
-	else
-		offset = event + 4;
-
 	chan = xadc_event_to_channel(indio_dev, event);
 
 	if (chan->type == IIO_TEMP) {