guybrush: remove RO_GSCVD area from FMAP

This area relates to storing of AP RO verification information.
CONFIG_VBOOT_GSCVD is enabled by default for TPM_GOOGLE_TI50 and
guybrush is using TPM_GOOGLE_CR50.

Signed-off-by: Himanshu Sahdev <himanshu.sahdev@intel.com>
Change-Id: I896b871bf2ac64e334514b979add9b8ac2c43945
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67376
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-by: Harsha B R <harsha.b.r@intel.com>

src/mainboard/google/guybrush/chromeos.fmd

@@ -22,7 +22,6 @@ FLASH@0xFF000000 16M {
 		RW_LEGACY(CBFS)
 		WP_RO@8M 8M {
 			RO_VPD(PRESERVE) 16K
-			RO_GSCVD 8K
 			RO_SECTION {
 				FMAP 2K
 				RO_FRID 64