N°2651 Remove lib test files from index

lib/symfony/dependency-injection/Tests/ReferenceTest.php

@@ -1,24 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\DependencyInjection\Tests;
-
-use PHPUnit\Framework\TestCase;
-use Symfony\Component\DependencyInjection\Reference;
-
-class ReferenceTest extends TestCase
-{
-    public function testConstructor()
-    {
-        $ref = new Reference('foo');
-        $this->assertEquals('foo', (string) $ref, '__construct() sets the id of the reference, which is used for the __toString() method');
-    }
-}