[ticket/690] Adjust setUp() declaration and classes

B3P-690

tests/testframework/database_test_case.php

@@ -18,7 +18,7 @@ abstract class database_test_case extends \phpbb_database_test_case
 
 	protected $db;
 
-	public function setUp()
+	public function setUp(): void
 	{
 		parent::setUp();
 		global $db;

tests/testframework/ui_test_case.php

@@ -1,18 +0,0 @@
-<?php
-/**
- *
- * @package Board3 Portal Testing
- * @copyright (c) Board3 Group ( www.board3.de )
- * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
- *
- */
-
-namespace board3\portal\tests\testframework;
-
-abstract class ui_test_case extends \phpbb_ui_test_case
-{
-	static protected function setup_extensions()
-	{
-		return array('board3/portal');
-	}
-}