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 <[e-mail]>
Reviewed-by: Hans de Goede <[e-mail]>
Link: https://lore.kernel.org/r/37443a675c[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/touchscreen/chipone_icn8505.c

···
 struct icn8505_data {
 	struct i2c_client *client;
 	struct input_dev *input;
-	struct gpio_desc *wake_gpio;
 	struct touchscreen_properties prop;
 	char firmware_name[32];
 };