edk2-ovmf: Drop REQUIRED_USE as it isn't set by python-any-r1

BUG=chromium:1114474
TEST=target-chromium-os-sdk builds

Change-Id: I09e7727ae6c3a0fe3af7dbbbd48d7b2568e81fc8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2347067
Commit-Queue: Allen Webb <allenwebb@google.com>
Tested-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
2 files changed