build system: Drop useless variable and dependency

We don't need COREBOOT_ROM_DEPENDENCIES anymore because the dependencies
are taken care of by the cbfs-files mechanism. REFCODE_BLOB also doesn't
need to be an explicit dependency.

Change-Id: I3f32cce79683e57a174724179bc2ac59a8cdda94
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/12648
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
2 files changed