This does exactly what it claims to do. It's not that I dislike shorts, it's that I watch so few of them that it makes no sense for them to take up such a prominent position in my feed. This doesn't just remove the thumbnails for shorts, it removes the entire section and all UI elements for shorts.

Works on the YouTube homepage, but not on the recommended when you are watching a video.

Simple, lightweight, and non intrusive.
Exactly what this plugin should be.