Find and delete all files without extensions witin a folder and its subfolders

I have a folder without around 500 subdirectories. There is a lot of trash to be found in it and I want to clean it up.

I have already deleted certain filetypes that I don't want, like images, with this command:

find . -mindepth 1 -iname "*.jpg" -type f -delete

However, I now want to delete all extension-less files. Files like "Shopping list" intead of "Shopping list.txt"

I have tried the following command but it did not work:

find . -mindepth 1 ! -iname "*.*" -type f -delete

Try this:

find . -type f  ! -name "*.*"  -delete

However, note that the above will not delete files whose name ends in a ., for example foo.. To delete those as well, use this instead:

find . -type f  ! -name "*.?*" -delete

You could use:

find . -type f ! -name "*.*" -delete