watchdog: stmp3xxx: Remove unused variables

Commit 8d2fa17151ea3 ("watchdog: stmp3xxx: Stop the watchdog on system
halt") introduced the following build warning:

drivers/watchdog/stmp3xxx_rtc_wdt.c: In function 'wdt_notify_sys':
drivers/watchdog/stmp3xxx_rtc_wdt.c:78:29: warning: unused variable 'pdata' [-Wunused-variable]

Remove the unused 'pdata' and 'dev' variables.

Signed-off-by: Fabio Estevam <[e-mail]>
Signed-off-by: Guenter Roeck <[e-mail]>
Signed-off-by: Wim Van Sebroeck <[e-mail]>

drivers/watchdog/stmp3xxx_rtc_wdt.c

···
 static int wdt_notify_sys(struct notifier_block *nb, unsigned long code,
 			  void *unused)
 {
-	struct device *dev = watchdog_get_drvdata(&stmp3xxx_wdd);
-	struct stmp3xxx_wdt_pdata *pdata = dev_get_platdata(dev);
-
 	switch (code) {
 	case SYS_DOWN:	/* keep enabled, system might crash while going down */
 		break;