AUTHORS, util/: Drop individual copyright notices

We have the git history which is a more reliable librarian.

Change-Id: Idbcc5ceeb33804204e56d62491cb58146f7c9f37
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41175
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: ron minnich <rminnich@gmail.com>

util/board_status/getrevision.sh

@@ -3,9 +3,6 @@
 # This file is part of the coreboot project. It originated in the
 # flashrom project but has been heavily modified since then.
 #
-# Copyright (C) 2013 Stefan Tauner
-# Copyright (C) 2013 Google Inc.
-#
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation; either version 2 of the License, or