[Web] Unset https_port after vars local inc

[Compose] New Dovecot image

data/web/inc/prerequisites.inc.php

@@ -1,6 +1,7 @@
 <?php
 require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/vars.inc.php';
 $default_autodiscover_config = $autodiscover_config;
+unset($https_port);
 if (file_exists($_SERVER['DOCUMENT_ROOT'] . '/inc/vars.local.inc.php')) {
   include_once $_SERVER['DOCUMENT_ROOT'] . '/inc/vars.local.inc.php';
 }

data/web/inc/vars.inc.php

@@ -68,7 +68,6 @@ $autodiscover_config = array(
     'port' => $https_port,
   ),
 );
-unset($https_port);
 
 // If false, we will use DEFAULT_LANG
 // Uses HTTP_ACCEPT_LANGUAGE header