Cleanup: manually remove header text not handled by automation

tests/gtests/testing/testing_main.cc

@@ -1,6 +1,4 @@
 /*
- * ***** BEGIN GPL LICENSE BLOCK *****
- *
  * 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
@@ -17,11 +15,6 @@
  *
  * The Original Code is Copyright (C) 2014 Blender Foundation.
  * All rights reserved.
- *
- * Contributor(s): Blender Foundation,
- *                 Sergey Sharybin
- *
- * ***** END GPL LICENSE BLOCK *****
  */
 
 #include "testing/testing.h"