diff --git a/buildtool.php b/buildtool.php
index 0bbf21d..08dced5 100644
--- a/buildtool.php
+++ b/buildtool.php
@@ -91,8 +91,6 @@ echo '
 <script src = "./assets/DYMO.Label.Framework.latest.js?'.script_version.'" type="text/javascript" charset="UTF-8"> </script>
 <script>
 	var link = "'.$baseurl.'";
-    var port, textEncoder, writableStreamClosed, writer, historyIndex = -1;
-    const lineHistory = [];
 </script>';