I added a feed that I don’t want to read anymore. I can’t find a way to remove it. I turned it off in the place where I can pick the 64 feeds I want to follow, but it entries from it still seem to turn up when other feeds have been read.
You can either right-click on the feed or click on the little arrow next to the feed. You’ll see a bunch of feed-specific actions, including deleting the feed.