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

This reverts commit 9cb1ff7330.

plugins/vendor/symfony/mime/DraftEmail.php

@@ -1,45 +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;
-
-use Symfony\Component\Mime\Header\Headers;
-use Symfony\Component\Mime\Part\AbstractPart;
-
-/**
- * @author Kevin Bond <kevinbond@gmail.com>
- */
-class DraftEmail extends Email
-{
-    public function __construct(?Headers $headers = null, ?AbstractPart $body = null)
-    {
-        parent::__construct($headers, $body);
-
-        $this->getHeaders()->addTextHeader('X-Unsent', '1');
-    }
-
-    /**
-     * Override default behavior as draft emails do not require From/Sender/Date/Message-ID headers.
-     * These are added by the client that actually sends the email.
-     */
-    public function getPreparedHeaders(): Headers
-    {
-        $headers = clone $this->getHeaders();
-
-        if (!$headers->has('MIME-Version')) {
-            $headers->addTextHeader('MIME-Version', '1.0');
-        }
-
-        $headers->remove('Bcc');
-
-        return $headers;
-    }
-}