Revert "Add new optional beta email parser thats based on ImapEngine instead of Webklex"

This reverts commit 9cb1ff7330.

plugins/vendor/symfony/mime/HtmlToTextConverter/HtmlToTextConverterInterface.php

@@ -1,25 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\Mime\HtmlToTextConverter;
-
-/**
- * @author Fabien Potencier <fabien@symfony.com>
- */
-interface HtmlToTextConverterInterface
-{
-    /**
-     * Converts an HTML representation of a Message to a text representation.
-     *
-     * The output must use the same charset as the HTML one.
-     */
-    public function convert(string $html, string $charset): string;
-}