Remove Yaml syntax check; we already have the binary in the test-framework

tests/www/RouterTest.php

-<?php
-
-declare(strict_types=1);
-
-namespace SimpleSAML\Test\Web;
-
-use PHPUnit\Framework\TestCase;
-use SimpleSAML\Configuration;
-use SimpleSAML\Module;
-use Symfony\Component\Yaml\Parser;
-use Symfony\Component\Yaml\Exception\ParseException;
-
-class RouterTest extends TestCase
-{
-    /**
-     * @return void
-     */
-    public function testSyntax(): void
-    {
-        $config = Configuration::loadFromArray([
-            'module.enable' => array_fill_keys(Module::getModules(), true),
-        ]);
-        Configuration::setPreLoadedConfig($config);
-
-        $yaml = new Parser();
-
-        // Module templates
-        foreach (Module::getModules() as $module) {
-            $basedir = Module::getModuleDir($module);
-            if (file_exists($basedir)) {
-                $files = array_diff(scandir($basedir), ['.', '..']);
-                foreach ($files as $file) {
-                    if (preg_match('/.(yml|yaml)$/', $file)) {
-                        try {
-                            $yaml->parse(file_get_contents('modules/' . $module . '/' . $file));
-                            $this->addToAssertionCount(1);
-                        } catch (ParseException $e) {
-                            $this->fail($e->getMessage() . ' in ' . $e->getFile() . ':' . $e->getLine());
-                        }
-                    }
-                }
-            }
-        }
-    }
-}