diff --git a/src/Repositories/MacTokenInterface.php b/src/Repositories/MacTokenInterface.php
deleted file mode 100644
index 00e35a4c..00000000
--- a/src/Repositories/MacTokenInterface.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-/**
- * OAuth 2.0 MAC Token Interface.
- *
- * @author      Alex Bilbie <hello@alexbilbie.com>
- * @copyright   Copyright (c) Alex Bilbie
- * @license     http://mit-license.org/
- *
- * @link        https://github.com/thephpleague/oauth2-server
- */
-namespace League\OAuth2\Server\Storage;
-
-use League\OAuth2\Server\Repositories\RepositoryInterface;
-
-/**
- * MacTokenInterface.
- */
-interface MacTokenInterface extends RepositoryInterface
-{
-    /**
-     * Create a MAC key linked to an access token.
-     *
-     * @param string $macKey
-     * @param string $accessToken
-     */
-    public function persistMacTokenEntity($macKey, $accessToken);
-
-    /**
-     * Get a MAC key by access token.
-     *
-     * @param string $accessToken
-     *
-     * @return string
-     */
-    public function getMacKeyByAccessTokenString($accessToken);
-}