setCookie: don't add domain to cookie

unless explicitly specified.
Browsers fail with singlepart domain names, e.g. localhost

Author: Naktibalda

src/Codeception/Module/WebDriver.php

@@ -840,12 +840,7 @@ public function setCookie($cookie, $value, array $params = [], $showDebug = true
         if (isset($params['expires'])) { // PhpBrowser compatibility
             $params['expiry'] = $params['expires'];
         }
-        if (!isset($params['domain'])) {
-            $urlParts = parse_url($this->config['url']);
-            if (isset($urlParts['host'])) {
-                $params['domain'] = $urlParts['host'];
-            }
-        }
+
         // #5401 Supply defaults, otherwise chromedriver 2.46 complains.
         $defaults = [
             'path' => '/',