Cleanup and simplify JS code

Change-Id: I393e22763c1a1d18878026bf459b747b150429fb
diff --git a/dev/js/src/hint/foundries.js b/dev/js/src/hint/foundries.js
index 67a6a88..8ece056 100644
--- a/dev/js/src/hint/foundries.js
+++ b/dev/js/src/hint/foundries.js
@@ -3,7 +3,7 @@
 
 define(function () {
 
-  var ah = KorAP.annotationHelper;
+  const ah = KorAP.annotationHelper;
 
   ah["getDesc"] = function (foundryLayer, value) {