Only want blog posts?
This feed used to carry only blog posts. It now carries everything I publish: posts, photos, links, videos, books I've read, and things I've watched. More is coming.
If that's what you signed up for, do nothing.
If you'd rather see just the blog posts, point your reader at the posts-only feed instead:
https://michaelharley.net/posts/feed.xml
There's a JSON version too, at https://michaelharley.net/posts/feed.json.