Input: chipone_icn8505 - remove an unused field in struct icn8505_data

In "struct icn8505_data", the 'wake_gpio' field is unused.
There is also nothing about gpio neither in this driver nor in the
data-sheet.

So, remove it.

Found with cppcheck, unusedStructMember.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/37443a675ca07c91c5f0118ce255406e6e3c08f5.1715502304.git.christophe.jaillet@wanadoo.frSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/chipone_icn8505.c

@@ -68,7 +68,6 @@ struct icn8505_touch_data {
 struct icn8505_data {
 	struct i2c_client *client;
 	struct input_dev *input;
-	struct gpio_desc *wake_gpio;
 	struct touchscreen_properties prop;
 	char firmware_name[32];
 };