gpio: ep93xx: remove unused variable

This one was left behind by a previous cleanup patch:

drivers/gpio/gpio-ep93xx.c: In function 'ep93xx_gpio_add_bank':
drivers/gpio/gpio-ep93xx.c:366:34: error: unused variable 'ic' [-Werror=unused-variable]

Fixes: 216f3736 ("gpio: ep93xx: Make irqchip immutable")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/gpio-ep93xx.c

@@ -363,8 +363,6 @@ static int ep93xx_gpio_add_bank(struct ep93xx_gpio_chip *egc,
 
 	girq = &gc->irq;
 	if (bank->has_irq || bank->has_hierarchical_irq) {
-		struct irq_chip *ic;
-
 		gc->set_config = ep93xx_gpio_set_config;
 		egc->eic = devm_kcalloc(dev, 1,
 					sizeof(*egc->eic),