The copano and collis variants have both a mem_parts_used.txt and a
mem_list_variant.txt. The mem_parts_used.txt files are empty, so delete
them.
BUG=None
TEST=None
Signed-off-by: Reka Norman <rekanorman@google.com>
Change-Id: Ia98aad7238b0173b8d5c048d89637bc297d02283
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57775
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>