do not try to load holder.js (not used, not there anymore)

Former-commit-id: 903a344d62ec723720d7ef41671ad471c15a7a3d

ippisite/ippidb/templates/base.html

@@ -12,7 +12,6 @@
         <script src="/static/jquery/jquery-3.3.1.min.js"></script>
         <script src="/static/popper/popper.min.js"></script>
         <script src="/static/bootstrap/js/bootstrap.min.js"></script>
-        <script src="/static/holder/holder.min.js"></script>
         <script defer src="/static/font-awesome/js/fontawesome-all.min.js"></script>
         <script type="text/javascript" src="/static/Kekule.js-master/release/kekule.js?modules=chemWidget,openbabel,indigo"></script>