ARM: shmobile: Remove obsolete sh-gpio.h

The last user of "sh-gpio.h" was removed in commit 1fa59bda
("ARM: shmobile: Remove legacy board code for Armadillo-800 EVA").
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/sh-gpio.h

-/*
- * Generic GPIO API and pinmux table support
- *
- * Copyright (c) 2008  Magnus Damm
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#ifndef __ASM_ARCH_GPIO_H
-#define __ASM_ARCH_GPIO_H
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/io.h>
-
-/*
- * FIXME !!
- *
- * current gpio frame work doesn't have
- * the method to control only pull up/down/free.
- * this function should be replaced by correct gpio function
- */
-static inline void __init gpio_direction_none(void __iomem * addr)
-{
-	__raw_writeb(0x00, addr);
-}
-
-#endif /* __ASM_ARCH_GPIO_H */