gpio: twl4030: Drop platform teardown callback

There is no machine providing a teardown callback, so drop the unused
code.

This is a preparation for making platform remove callbacks return void.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>

drivers/gpio/gpio-twl4030.c

@@ -593,18 +593,7 @@ static int gpio_twl4030_probe(struct platform_device *pdev)
 /* Cannot use as gpio_twl4030_probe() calls us */
 static int gpio_twl4030_remove(struct platform_device *pdev)
 {
-	struct twl4030_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct gpio_twl4030_priv *priv = platform_get_drvdata(pdev);
-	int status;
-
-	if (pdata && pdata->teardown) {
-		status = pdata->teardown(&pdev->dev, priv->gpio_chip.base,
-					 TWL4030_GPIO_MAX);
-		if (status) {
-			dev_dbg(&pdev->dev, "teardown --> %d\n", status);
-			return status;
-		}
-	}
 
 	gpiochip_remove(&priv->gpio_chip);
 

include/linux/mfd/twl.h

@@ -594,8 +594,6 @@ struct twl4030_gpio_platform_data {
 
 	int		(*setup)(struct device *dev,
 				unsigned gpio, unsigned ngpio);
-	int		(*teardown)(struct device *dev,
-				unsigned gpio, unsigned ngpio);
 };
 
 struct twl4030_madc_platform_data {