pinctrl: sh-pfc: Kill unused variable in sh_pfc_remove()

If CONFIG_PINCTRL_SH_PFC_GPIO=n:

    drivers/pinctrl/sh-pfc/core.c: In function 'sh_pfc_remove':
    drivers/pinctrl/sh-pfc/core.c:649:17: warning: unused variable 'pfc' [-Wunused-variable]

Fixes: 67ec8d7b ("pinctrl: ish-pfc: Use devm_pinctrl_register() for pinctrl registration")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sh-pfc/core.c

@@ -598,10 +598,8 @@ static int sh_pfc_probe(struct platform_device *pdev)
 
 static int sh_pfc_remove(struct platform_device *pdev)
 {
-	struct sh_pfc *pfc = platform_get_drvdata(pdev);
-
 #ifdef CONFIG_PINCTRL_SH_PFC_GPIO
-	sh_pfc_unregister_gpiochip(pfc);
+	sh_pfc_unregister_gpiochip(platform_get_drvdata(pdev));
 #endif
 
 	return 0;