cbfs: Remove mention of CREDITS files

As requested by Wolfgang, remove references to CREDITS in the CBFS
files.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/fs/cbfs/Makefile b/fs/cbfs/Makefile
index 2be8a68..e0e6de6 100644
--- a/fs/cbfs/Makefile
+++ b/fs/cbfs/Makefile
@@ -1,6 +1,4 @@
-#
-# See file CREDITS for list of people who contributed to this
-# project.
+# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License as