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

Remove unused header files in
src/vendorcode/amd/pi/00670F00/agesa_headers.h.  This  is a first
clean up.  Hopefully more headers will be removed in other commits.
Header files cannot be removed at this time.  They are used by files in
vendorcode/amd/pi/00670F00/.

BUG=b:77944801
BRANCH=none
TEST=build Gardenia and Grunt

Change-Id: I99b77f6ba41ded30122a01bbe709681312561436
Signed-off-by: Garrett Kirkendall <garrett.kirkendall@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/25644
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed