spi: spidev: remove unused completion

This removes an unused completion from spidev_sync.

It was introduced in

	commit 25d5cb4b ("spi: remove some spidev oops-on-rmmod paths")

and it was no longer used after:

	commit 98d6f479 ("spi: spidev: use spi_sync instead of spi_async")
Signed-off-by: NSeraphime Kirkovski (Haapie) <kirkseraph@gmail.com>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spidev.c

@@ -99,7 +99,6 @@ MODULE_PARM_DESC(bufsiz, "data bytes in biggest supported SPI message");
 static ssize_t
 spidev_sync(struct spidev_data *spidev, struct spi_message *message)
 {
-	DECLARE_COMPLETION_ONSTACK(done);
 	int status;
 	struct spi_device *spi;