iio: apds9960: Drop GPIO includes

The driver includes <linux/gpio.h> and <linux/of_gpio.h> yet
fails to use symbols from any of the include files, so drop
these includes.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/light/apds9960.c

@@ -15,7 +15,6 @@
 #include <linux/mutex.h>
 #include <linux/err.h>
 #include <linux/irq.h>
-#include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
@@ -24,7 +23,6 @@
 #include <linux/iio/events.h>
 #include <linux/iio/kfifo_buf.h>
 #include <linux/iio/sysfs.h>
-#include <linux/of_gpio.h>
 
 #define APDS9960_REGMAP_NAME	"apds9960_regmap"
 #define APDS9960_DRV_NAME	"apds9960"