delete code for loading anchor.js from internet

Author: BBong119

_layouts/default-layout.html

@@ -87,9 +87,7 @@
         {%- include page_footer.html -%}
     </div>
 
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/anchor-js/4.1.0/anchor.min.js"
-        integrity="sha256-lZaRhKri35AyJSypXXs4o6OPFTbTmUoltBbDCbdzegg=" crossorigin="anonymous"></script>
-    <script>anchors.add();</script>
+    <script type="text/javascript">anchors.add();</script>
 
     {%- if page.needAutoGenerateSidebar -%}
     <script>