diff --git a/typo3/sysext/adminpanel/Classes/ViewHelpers/SubModuleRenderViewHelper.php b/typo3/sysext/adminpanel/Classes/ViewHelpers/SubModuleRenderViewHelper.php
index 44934a5936295d2be76aa7207a43f08b15a759fd..f3b7221c402a5a13078493418c0be8c422ab2b9f 100644
--- a/typo3/sysext/adminpanel/Classes/ViewHelpers/SubModuleRenderViewHelper.php
+++ b/typo3/sysext/adminpanel/Classes/ViewHelpers/SubModuleRenderViewHelper.php
@@ -33,13 +33,6 @@ class SubModuleRenderViewHelper extends AbstractViewHelper
 {
     use CompileWithRenderStatic;
 
-    /**
-     * First level cache of user names
-     *
-     * @var array
-     */
-    protected static $usernameRuntimeCache = [];
-
     /**
      * Initializes the arguments
      */