Fix syntax error

Author: tvdijen

src/Controller/MetaRefresh.php

@@ -21,9 +21,6 @@
 
 class MetaRefresh
 {
-    /** @var \SimpleSAML\Configuration */
-    protected Configuration $config;
-
     /** @var \SimpleSAML\Configuration */
     protected Configuration $module_config;
 
@@ -45,7 +42,6 @@ class MetaRefresh
     public function __construct(
         protected Configuration $config,
     ) {
-        $this->config = $config;
         $this->module_config = Configuration::getConfig('module_metarefresh.php');
         $this->authUtils = new Utils\Auth();
     }