chromeos: stop sharing write protect GPIO with depthcharge

wpsw_boot is deprecated in favour of wpsw_cur.  As such,
coreboot no longer needs to share "write protect" GPIO
with depthcharge.

BUG=b:124141368, chromium:950273
TEST=make clean && make test-abuild
BRANCH=none

Change-Id: I2fcb7f82aa063fd72928171af5cbef0356ba620c
Signed-off-by: Joel Kitching <kitching@google.com>
Cq-Depend: chromium:2088434
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39318
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/butterfly/chromeos.c

@@ -31,10 +31,6 @@
 void fill_lb_gpios(struct lb_gpios *gpios)
 {
 	struct lb_gpio chromeos_gpios[] = {
-		/* Write Protect: GPIO active Low */
-		{WP_GPIO, ACTIVE_LOW, !get_write_protect_state(),
-		 "write protect"},
-
 		/* lid switch value from EC */
 		{-1, ACTIVE_HIGH, get_lid_switch(), "lid"},