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

This reverts commit 9cb1ff7330.

plugins/vendor/egulias/email-validator/src/Validation/NoRFCWarningsValidation.php

@@ -1,41 +0,0 @@
-<?php
-
-namespace Egulias\EmailValidator\Validation;
-
-use Egulias\EmailValidator\EmailLexer;
-use Egulias\EmailValidator\Result\InvalidEmail;
-use Egulias\EmailValidator\Result\Reason\RFCWarnings;
-
-class NoRFCWarningsValidation extends RFCValidation
-{
-    /**
-     * @var InvalidEmail|null
-     */
-    private $error;
-
-    /**
-     * {@inheritdoc}
-     */
-    public function isValid(string $email, EmailLexer $emailLexer) : bool
-    {
-        if (!parent::isValid($email, $emailLexer)) {
-            return false;
-        }
-
-        if (empty($this->getWarnings())) {
-            return true;
-        }
-
-        $this->error = new InvalidEmail(new RFCWarnings(), '');
-
-        return false;
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function getError() : ?InvalidEmail
-    {
-        return $this->error ?: parent::getError();
-    }
-}