removed helper file.

Removed the syncfusion-helper.js script from the HTML.

Author: indumathi-murali

index.html

@@ -8,7 +8,6 @@
     <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
     <title>Essential JS 2 for React - Feature Rich DataGrid</title>
     <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
-    <script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type="text/javascript"></script> 
     <link href="https://cdn.syncfusion.com/ej2/29.1.33/material3.css" class="theme-primary" rel="stylesheet">
     <link href="https://ej2.syncfusion.com/demos/src/grid/images/Grid/style.css" rel="stylesheet" type="text/css"/>
     <link rel="stylesheet" href="https://cdn.syncfusion.com/content/images/common/menu/master/icons/menufontV2.css?v1">