Resolve "PERSONALDOCUMENT_ENABLE wird noch verwendet?"

Closes #4093

Merge request studip/studip!2937

lib/navigation/AdminNavigation.php

@@ -207,11 +207,6 @@ class AdminNavigation extends Navigation
                 $navigation->addSubNavigation('cronjobs', new Navigation(_('Cronjobs'), 'dispatch.php/admin/cronjobs/schedules'));
             }
 
-            if (Config::get()->PERSONALDOCUMENT_ENABLE) {
-                $navigation->addSubNavigation('document_area', new Navigation(_('Pers. Dateibereich'), 'dispatch.php/document/administration'));
-            }
-
-
             $navigation->addSubNavigation('admissionrules', new Navigation(_('Anmelderegeln'), 'dispatch.php/admission/ruleadministration'));
 
             if (Config::get()->API_ENABLED) {