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

This reverts commit 9cb1ff7330.

plugins/vendor/laravel/serializable-closure/src/Signers/Hmac.php

@@ -1,53 +0,0 @@
-<?php
-
-namespace Laravel\SerializableClosure\Signers;
-
-use Laravel\SerializableClosure\Contracts\Signer;
-
-class Hmac implements Signer
-{
-    /**
-     * The secret key.
-     *
-     * @var string
-     */
-    protected $secret;
-
-    /**
-     * Creates a new signer instance.
-     *
-     * @param  string  $secret
-     * @return void
-     */
-    public function __construct($secret)
-    {
-        $this->secret = $secret;
-    }
-
-    /**
-     * Sign the given serializable.
-     *
-     * @param  string  $serialized
-     * @return array
-     */
-    public function sign($serialized)
-    {
-        return [
-            'serializable' => $serialized,
-            'hash' => base64_encode(hash_hmac('sha256', $serialized, $this->secret, true)),
-        ];
-    }
-
-    /**
-     * Verify the given signature.
-     *
-     * @param  array{serializable: string, hash: string}  $signature
-     * @return bool
-     */
-    public function verify($signature)
-    {
-        return hash_equals(base64_encode(
-            hash_hmac('sha256', $signature['serializable'], $this->secret, true)
-        ), $signature['hash']);
-    }
-}