diff --git a/js/functions.js b/js/functions.js
index 153ccf3e73..75fe3bc6a8 100644
--- a/js/functions.js
+++ b/js/functions.js
@@ -44,11 +44,6 @@ var sql_autocomplete = false;
  */
 var sql_autocomplete_default_table = '';
 
-/**
- * @var chart_activeTimeouts object active timeouts that refresh the charts. When disabling a realtime chart, this can be used to stop the continuous ajax requests
- */
-var chart_activeTimeouts = {};
-
 /**
  * @var central_column_list array to hold the columns in central list per db.
  */