Skyrim: Remove CONFIG_SYSTEM_UNLOCKED
Skyrim: Remove CONFIG_SYSTEM_UNLOCKED

Skyrim is at a stage where this CONFIG can be removed.

BRANCH=None
BUG=b:215404321
TEST=zmake build skyrim; boot up on a D4 skyrim

Signed-off-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>
Change-Id: I12a1bbb42d49a836547e4d5f580b274c97204ade
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3949612
Reviewed-by: Jonathon Murphy <ef000d5e2b938b44ac60c709bf9862f8d0f6bdc2@google.com>
Commit-Queue: Jonathon Murphy <ef000d5e2b938b44ac60c709bf9862f8d0f6bdc2@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec