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/spdtool/spdtool.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
-
 # spdtool - Tool for partial deblobbing of UEFI firmware images
-# Copyright (C) 2019 9elements Agency GmbH <patrick.rudolph@9elements.com>
 #
 # 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