how to remove imported iCalendar data frim calcurse?

I have been googling and trying to remove icalendardatafile.ics I imported into calcurse usingCode:~ $ calcurse -i ~/Downloads/icalendardatafile.icsNow I am trying to remove it from calcurse.
I removed ~/.config/calcurse folder and start calcurse but the holidays are still there I imported by icalendardatafile.ics that I downloaded from internet.

Thanks in advance.