This feature is available in all editions.
All topics must be removed from a community before the community can be deleted. Refer to Deleting a Topic for instructions on how to do that.
Click on the Collaboration icon.
Click on a name in the Communities list, and then click the recycle bin button in the top right corner of the page.
Looking for a specific topic? Type your search terms in the quick search box at the top of any page to find matching topics.