rtc: ds1343: Remove unused struct spi_device in struct ds1343_priv

struct spi_device in struct ds1343_priv is not used, remove it.

CC: Alessandro Zummo <a.zummo@towertech.it>
CC: Alexandre Belloni <alexandre.belloni@bootlin.com>
CC: Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>
CC: Ankur Srivastava <sankurece@gmail.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Link: https://lore.kernel.org/r/20191218081917.3308211-1-iwamatsu@nigauri.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-ds1343.c

@@ -75,7 +75,6 @@ static const struct spi_device_id ds1343_id[] = {
 MODULE_DEVICE_TABLE(spi, ds1343_id);
 
 struct ds1343_priv {
-	struct spi_device *spi;
 	struct rtc_device *rtc;
 	struct regmap *map;
 	int irq;
@@ -362,8 +361,6 @@ static int ds1343_probe(struct spi_device *spi)
 	if (!priv)
 		return -ENOMEM;
 
-	priv->spi = spi;
-
 	/* RTC DS1347 works in spi mode 3 and
 	 * its chip select is active high. Active high should be defined as
 	 * "inverse polarity" as GPIO-based chip selects can be logically