[Config] removed obsolete code

Author: fabpot

Loader/AnnotationDirectoryLoader.php

@@ -39,7 +39,7 @@ public function load($path, $type = null)
         $collection = new RouteCollection();
         $collection->addResource(new DirectoryResource($dir, '/\.php$/'));
         $files = iterator_to_array(new \RecursiveIteratorIterator(
-            new RecursiveCallbackFilterIterator(
+            new \RecursiveCallbackFilterIterator(
                 new \RecursiveDirectoryIterator($dir),
                 function (\SplFileInfo $current) {
                     return '.' !== substr($current->getBasename(), 0, 1);
@@ -87,34 +87,3 @@ public function supports($resource, $type = null)
         return is_dir($path) && (!$type || 'annotation' === $type);
     }
 }
-
-/**
- * @internal To be removed as RecursiveCallbackFilterIterator is available since PHP 5.4
- */
-class RecursiveCallbackFilterIterator extends \FilterIterator implements \RecursiveIterator
-{
-    private $iterator;
-    private $callback;
-
-    public function __construct(\RecursiveIterator $iterator, $callback)
-    {
-        $this->iterator = $iterator;
-        $this->callback = $callback;
-        parent::__construct($iterator);
-    }
-
-    public function accept()
-    {
-        return call_user_func($this->callback, $this->current(), $this->key(), $this->iterator);
-    }
-
-    public function hasChildren()
-    {
-        return $this->iterator->hasChildren();
-    }
-
-    public function getChildren()
-    {
-        return new static($this->iterator->getChildren(), $this->callback);
-    }
-}