Most of them were only in the lower scale maps and one of them is still there. Swisstopo even wrote an article [1] about them and gives some background and name

Most of them were only in the lower scale maps and one of them is still there. Swisstopo even wrote an article [1] about them and gives some background and names the cartographers that added them. So our bureaucratic machine seems to have a sense of humor. [1] https://www.swisstopo.admin.ch/en/hidden-images-20161221 https://www.swisstopo.admin.ch/en/hidden-images-20161221