Revert "Add dirFiles Twig function"

This reverts commit c70ae88a2a.

four-creative.php

@@ -5,14 +5,5 @@ use Grav\Common\Theme;
 
 class FourCreative extends Theme
 {
-    public static function getSubscribedEvents()
+    // Access plugin events in this class
-    {
-        return ['onTwigExtensions' => ['onTwigExtensions', 0]];
-    }
-
-    public function onTwigExtensions()
-    {
-        require_once __DIR__.DIRECTORY_SEPARATOR.'php'.DIRECTORY_SEPARATOR.'DirFilesExtension.php';
-        $this->grav['twig']->twig->addExtension(new DirFilesExtension());
-    }
 }

php/DirFilesExtension.php

@@ -1,35 +0,0 @@
-<?php
-declare(strict_types=1);
-
-namespace Grav\Theme;
-
-use Grav\Common\Twig\Extension\GravExtension;
-
-class DirFilesExtension extends GravExtension
-{
-    public function getName(): string
-    {
-        return 'DirFilesExtension';
-    }
-
-    public function getFunctions(): array
-    {
-        return [new \Twig_SimpleFunction('dirFiles', [$this, 'getDirFiles'])];
-    }
-
-    public function getDirFiles(string $dir, string $exts): array
-    {
-        $res = array();
-        $dir = '..'.DIRECTORY_SEPARATOR.(str_starts_with($dir, '/') ? substr($dir, 1) : $dir);
-        if (file_exists($dir) && $dirHandle = opendir($dir))
-        {
-            while ($entry = readdir($dirHandle)) {
-                if (preg_match('/^[a-zA-Z0-9-_][a-zA-Z0-9-_.]*\.('.$exts.')$/', $entry)) {
-                    $res[] = $dir.DIRECTORY_SEPARATOR.$entry;
-                }
-            }
-        }
-
-        return $res;
-    }
-}