gpio: ep93xx: remove unused inline function

[H Hartley Sweeten <hartleys@visionengravers.com>]

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ryan Mallon <rmallon@gmail.com>
Cc: Grant Likely <grant.likely@secretlab.ca>

---

diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c
index 468b27d..e0ad8e0 100644
--- a/drivers/gpio/gpio-ep93xx.c
+++ b/drivers/gpio/gpio-ep93xx.c
@@ -62,11 +62,6 @@ static void ep93xx_gpio_update_int_params(unsigned port)
 		EP93XX_GPIO_REG(int_en_register_offset[port]));
 }
 
-static inline void ep93xx_gpio_int_mask(unsigned line)
-{
-	gpio_int_unmasked[line >> 3] &= ~(1 << (line & 7));
-}
-
 static void ep93xx_gpio_int_debounce(unsigned int irq, bool enable)
 {
 	int line = irq_to_gpio(irq);