Removed Mac token type for now

src/TokenType/Mac.php

@@ -1,23 +0,0 @@
-<?php
-/**
- * OAuth 2.0 MAC Token Type
- *
- * @package     league/oauth2-server
- * @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\TokenType;
-
-class Mac extends AbstractTokenType implements TokenTypeInterface
-{
-    /**
-     * {@inheritdoc}
-     */
-    public function generateResponse()
-    {
-        throw new \RuntimeException('MAC tokens are not currently supported');
-    }
-}