remove fork alert from PR branch

static-parts/index-start.html

@@ -23,7 +23,6 @@
     <link rel="stylesheet" href="prism.css">
   </head>
   <script>
-    document.addEventListener("load", alert("Attention! This site is only a fork of the original project demonstrating the newest changes made by myself. The original project can be found by clicking on the logo."));
     function search() {
         var input, filter, nav,a, i;
         input = document.getElementById('searchInput');