11423-Graph analytics. Remove Group None from export filter

pandora_console/include/javascript/graph_analytics.js

@@ -657,7 +657,7 @@ $("#button-export-modal").click(function(e) {
   const filter = parseInt($("#export-filter-id").val());
   const group = parseInt($("#export-group-id").val());
 
-  if (filter !== 0 && group !== 0) {
+  if (filter !== 0) {
     $.ajax({
       method: "POST",
       url: "ajax.php",

pandora_console/operation/reporting/graph_analytics.php

@@ -617,7 +617,7 @@ $data[1] .= html_print_select(
     'export-group-id',
     '',
     '',
-    __('None'),
+    '',
     0,
     true,
     false,