diff --git a/src/di/src/Annotation/AspectCollector.php b/src/di/src/Annotation/AspectCollector.php
index 53fdf2d03..0b829eb49 100644
--- a/src/di/src/Annotation/AspectCollector.php
+++ b/src/di/src/Annotation/AspectCollector.php
@@ -20,14 +20,6 @@ class AspectCollector extends MetadataCollector
      */
     protected static $container = [];
 
-    public static function setBefore(string $aspect, array $classes, array $annotations)
-    {
-        $before = static::get('before');
-        $before['classes'][$aspect] = array_replace($before['classes'][$aspect] ?? [], $classes);
-        $before['annotations'][$aspect] = array_replace($before['annotations'][$aspect] ?? [], $annotations);
-        static::set('before', $before);
-    }
-
     public static function setArround(string $aspect, array $classes, array $annotations)
     {
         $arround = static::get('arround');
diff --git a/src/di/src/Annotation/MetadataHolder.php b/src/di/src/Annotation/MetadataHolder.php
deleted file mode 100644
index 0e820c911..000000000
--- a/src/di/src/Annotation/MetadataHolder.php
+++ /dev/null
@@ -1,54 +0,0 @@
-<?php
-declare(strict_types=1);
-/**
- * This file is part of Hyperf.
- *
- * @link     https://hyperf.org
- * @document https://wiki.hyperf.org
- * @contact  group@hyperf.org
- * @license  https://github.com/hyperf-cloud/hyperf/blob/master/LICENSE
- */
-
-namespace Hyperf\Di\Annotation;
-
-class MetadataHolder implements MetadataHolderInterface
-{
-    /**
-     * @var array
-     */
-    private $container = [];
-
-    /**
-     * Retrieve the metadata via key.
-     */
-    public function get(string $key, $default = null)
-    {
-        return $this->container[$key] ?? $default;
-    }
-
-    /**
-     * Set the metadata to holder.
-     */
-    public function set(string $key, $value): void
-    {
-        $this->container[$key] = $value;
-    }
-
-    /**
-     * Serialize the all metadata to a string.
-     */
-    public function serialize(): string
-    {
-        return serialize($this->container);
-    }
-
-    /**
-     * Deserialize the serialized metadata and set the metadata to holder.
-     */
-    public function deserialize(string $metadata): bool
-    {
-        $data = unserialize($metadata);
-        $this->container = $data;
-        return true;
-    }
-}
diff --git a/src/di/src/Annotation/MetadataHolderInterface.php b/src/di/src/Annotation/MetadataHolderInterface.php
deleted file mode 100644
index a9e48c63f..000000000
--- a/src/di/src/Annotation/MetadataHolderInterface.php
+++ /dev/null
@@ -1,35 +0,0 @@
-<?php
-declare(strict_types=1);
-/**
- * This file is part of Hyperf.
- *
- * @link     https://hyperf.org
- * @document https://wiki.hyperf.org
- * @contact  group@hyperf.org
- * @license  https://github.com/hyperf-cloud/hyperf/blob/master/LICENSE
- */
-
-namespace Hyperf\Di\Annotation;
-
-interface MetadataHolderInterface
-{
-    /**
-     * Retrieve the metadata via key.
-     */
-    public function get(string $key, $default = null);
-
-    /**
-     * Set the metadata to holder.
-     */
-    public function set(string $key, $value): void;
-
-    /**
-     * Serialize the all metadata to a string.
-     */
-    public function serialize(): string;
-
-    /**
-     * Deserialize the serialized metadata and set the metadata to holder.
-     */
-    public function deserialize(string $metadata): bool;
-}