Remove wrong copyright blocks [skip ci]

app/Exceptions/Handler.php

@@ -20,15 +20,6 @@
  */
 declare(strict_types=1);
 
-/**
- * Handler.php
- * Copyright (c) 2017 thegrumpydictator@gmail.com
- * This software may be modified and distributed under the terms of the
- * Creative Commons Attribution-ShareAlike 4.0 International License.
- *
- * See the LICENSE file for details.
- */
-
 namespace FireflyIII\Exceptions;
 
 use ErrorException;