Removing Typescript on maps container

Typescript is almost not used on this container (and causing a bunch of startup errors that are not important but worrying first time users). Removing it completely.

maps/starter/script.js

@@ -0,0 +1,18 @@
+/// <reference path="../node_modules/@workadventure/iframe-api-typings/iframe_api.d.ts" />
+
+let currentPopup = undefined;
+const today = new Date();
+const time = today.getHours() + ":" + today.getMinutes();
+
+WA.room.onEnterZone('clock', () => {
+    currentPopup =  WA.ui.openPopup("clockPopup","It's " + time,[]);
+})
+
+WA.room.onLeaveZone('clock', closePopUp)
+
+function closePopUp(){
+    if (currentPopup !== undefined) {
+        currentPopup.close();
+        currentPopup = undefined;
+    }
+}