apple/macbook21: Remove useless seabios config

Change-Id: If771a84f25710e1fb2228816e3ca0139e2f95aa7
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6732
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
lenovo/x201: Remove empty mainboard.asl

Change-Id: I37d48279b1b022c4573bd09d3db6bf536d5dab9a
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6724
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>