diff --git a/web/dart/parse_sitemap.dart b/web/dart/parse_sitemap.dart
index 1ea5f4c..3c1bafb 100644
--- a/web/dart/parse_sitemap.dart
+++ b/web/dart/parse_sitemap.dart
@@ -46,10 +46,6 @@ Future<Map<String, String>> parseSitemap() async {
   return detectPages(sitemap);
 }
 
-Future sleep(Duration time) async {
-  return Future.delayed(time);
-}
-
 Future<void> createSitemap() async {
   final sitemap = await parseSitemap();
   final pages = html.querySelector('#drop-page');