Your forum is fantastic but my site right not is very small and not likely to generate traffic for a forum. At such a time, the monthly 10 dollar charges mean 120 dollars a year with very low ROI.
So how do i delete the discourse forum completely? And how to i remove the Discourse droplet so that i am not charged for the same?
From https://cloud.digitalocean.com/droplets click on the instance you want to delete. Then choose destroy from the left side menu and click the big delete button.