power: supply: bq24190_charger: Drop unused include

The driver includes <linux/gpio.h> but fails to use any
symbols from the file.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/supply/bq24190_charger.c

@@ -16,7 +16,6 @@
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/workqueue.h>
-#include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/extcon-provider.h>