AMD CIMX: Drop unused code

We never define B1_IMAGE or B2_IMAGE. These are about building
CIMx as separate binary modules, while coreboot builds these into
same romstage or ramstage module.

Change-Id: I9cfa3f0bff8332aff4b661d56d0e7b340a992992
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/14393
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Kerry Sheh <shekairui@gmail.com>
13 files changed