vendorcode/amd/pi/00670F00: remove unused headers

These header files are not used, so remove them.

BUG=b:68812513
TEST=Build

Change-Id: Ib43fc544186f7b46ecf9b318b9edcf008f2d08dc
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/22298
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
7 files changed