removing dead code

src/viralhostrange/viralhostrangedb/static/css/browse.css

@@ -141,23 +141,7 @@ th.hover {
 }
 .grid_host thead th:last-child:first-child.splitter{
     display:none;
-}/*
-#grid_host_clone tbody td,
-#grid_host_clone thead th[data-col] {
-    visibility: hidden;
 }
-#grid_container.freeze-row-header-v2{
-    overflow-x:scroll;
-}
-#grid_host_clone{
-    display:none;
-}
-.freeze-row-header-v2 #grid_host_clone{
-    display:initial;
-    position: absolute;
-    top: 0;
-    pointer-events: none;
-}*/
 /*https://codepen.io/paulobrien/pen/gWoVzN*/
 #grid_container.freeze-row-header-v3{
     position: relative;

src/viralhostrange/viralhostrangedb/static/js/browse.js

 $(document).ready(function(){
-    //let grid_host=jQuery("#grid_host");
-    //grid_host.clone(true).attr("id","grid_host_clone").appendTo(grid_host.parent());
-
     var parts = location.search.substring(1).split('&');
     mem['virus']=[];
     mem['host']=[];
@@ -81,8 +78,6 @@ function host_changed(pk, checked, do_load_data){
                             '<a target="_blank" href="'+get_host_url.replace("000000",pk)+'">_</a>'+
                             '<span class="ratio"></span>'+
                             '</th>';
-            let cell_th_clone=$(cell_th_str);
-            cell_th_clone.appendTo($("#grid_host_clone").find("thead>tr"));
             let cell_th=$(cell_th_str);
             hover_behavior(cell_th);
             cell_th.appendTo($("#grid_host").find("thead>tr"));
@@ -145,8 +140,6 @@ function virus_changed(pk, checked, do_load_data){
                           '<span class="ratio"></span>'+
                         '</th>'+
                       '</tr>';
-            let row_clone=$(row_str);
-            row_clone.appendTo($("#grid_host_clone").find("tbody"));
             let row=$(row_str);
             row.appendTo($("#grid_host").find("tbody"));
             let hosts = $('#grid_host thead>tr>th[data-col]').map(function(i,o){

src/viralhostrange/viralhostrangedb/static/js/virus_or_host_detail.js

 $(document).ready(function(){
-    //let grid_host=jQuery("#grid_host");
-    //grid_host.clone(true).attr("id","grid_host_clone").appendTo(grid_host.parent());
     load_data_vh().then(refresh_all_infection_ratio);
     $("[data-toggle-css-class]").change(function(e){
         $(e.target).attr("data-toggle-css-class").split(" ").map(function(c){
@@ -68,8 +66,6 @@ function load_data_vh(){
                             '<span class="ratio"></span>'+
                             '</th>'+
                           '</tr>';
-                let tr_row_clone = $(tr_row_str);
-                tr_row_clone.appendTo($("#grid_host_clone").find("tbody"));
                 let tr_row = $(tr_row_str);
                 tr_row.appendTo($("#grid_host").find("tbody"));
                 let hosts = $('#grid_host thead>tr>th[data-col]').map(function(i,o){