mb/google/brya: Remove `mb_gpio_lock_config()` override function

This patch removes `lockable_brya_gpios` lists and
`mb_gpio_lock_config` override function from brya baseboard directory as
the variant GPIO pad configuration table is now capable of locking GPIO
PADs.

BUG=b:208827718
TEST=Able to built and boot brya.

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: Ifc7354f2ae3817459b5494d572c603eba48ec66a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61503
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
diff --git a/src/mainboard/google/brya/variants/baseboard/brya/gpio.c b/src/mainboard/google/brya/variants/baseboard/brya/gpio.c
index d037e40..9c99363 100644
--- a/src/mainboard/google/brya/variants/baseboard/brya/gpio.c
+++ b/src/mainboard/google/brya/variants/baseboard/brya/gpio.c
@@ -456,12 +456,3 @@
 	*num = 0;
 	return NULL;
 }
-
-static struct gpio_lock_config lockable_brya_gpios[] = {
-};
-
-const struct gpio_lock_config *mb_gpio_lock_config(size_t *num)
-{
-	*num = ARRAY_SIZE(lockable_brya_gpios);
-	return lockable_brya_gpios;
-}