watchdog: shwdt: Remove redundant platform_set_drvdata()

Commit 0998d063 (device-core: Ensure drvdata = NULL when no
driver is bound) removes the need to set driver data field to
NULL.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/shwdt.c

@@ -296,8 +296,6 @@ static int sh_wdt_remove(struct platform_device *pdev)
 {
 	struct sh_wdt *wdt = platform_get_drvdata(pdev);
 
-	platform_set_drvdata(pdev, NULL);
-
 	watchdog_unregister_device(&sh_wdt_dev);
 
 	pm_runtime_disable(&pdev->dev);