How do I delete a datasource?

This is a pretty common question, and falls within the topic of data management. You can see an example here.

If you’re using the console, the easiest way to delete a datasource is to mark the segment as unused, and then delete the unused segment (which is the same as issuing a kill task). Here’s what that looks like:

If you’d like some practice, there’s a tutorial here, and the relevant doc is here.