I am trying to export a graph data in csv format through amcharts4, it is getting exported properly but it also has a none columne which I don’t need it. 
I have tried everything like exporting Individual columns. I have used none colum  to show total count in graph but I dont need this column in export to excel.
As you can see in codepen I am showing total no of count or each column in graph. I have attached the coedpen link to go through.

  (https://codepen.io/rajjaiswal/pen/gONWNxm?editors=0010)

I need to remove none column

Final result