Disable "Changes you made may not be saved." popup

Hi Team,

I am using HTML panel for grafana to build dynamic cascading dropdown from MySql database. I am using URL Rewriting within the html panel to assign the dropdown value into Grafana Template variables. These variables are using in SQL Queries in different panels.
Now while changing the value from the dropdown and refreshing the grafana url after re-writing data, every time one pop-up window is appearing and stating “Changes you made may not be saved.”.

Please let me know the way to dis-appear the pop-up window