ARM: omap1: Drop header on AMS Delta

The AMS Delta board uses GPIO descriptors exclusively and
does not have any dependencies on the legacy <linux/gpio.h>
header, so just drop it.

Acked-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Fixes: 92bf78b ("gpio: omap: use dynamic allocation of base")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Linus Walleij

arch/arm/mach-omap1/board-ams-delta.c

@@ -11,7 +11,6 @@
 #include <linux/gpio/driver.h>
 #include <linux/gpio/machine.h>
 #include <linux/gpio/consumer.h>
-#include <linux/gpio.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/input.h>