Update meta files for new release.

app/Models/GroupMembership.php

@@ -21,25 +21,6 @@
  */
 
 declare(strict_types=1);
-/*
- * GroupMembership.php
- * Copyright (c) 2021 james@firefly-iii.org
- *
- * This file is part of Firefly III (https://github.com/firefly-iii).
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
 
 namespace FireflyIII\Models;