Remove superfluous copyright information

Author: sebastianbergmann

src/examples/error-handling/deprecation/tests/FirstPartyClassTest.php

@@ -1,12 +1,4 @@
 <?php declare(strict_types=1);
-/*
- * This file is part of PHPUnit.
- *
- * (c) Sebastian Bergmann <[email protected]>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
 namespace example;
 
 use PHPUnit\Framework\TestCase;