Weird areas in Olsztyn - Vandalism?

I found these ways in Olsztyn. They do not seem to serve any purpose. I could not see anything similar in Bing aerial imagery or which is cited as the source.

Should they get deleted?

Yes, I think so.

Please first ask. Maybe they are area:highway elements but with wrong or not existing attributation.

It exists:

So, let it be, but add area:highway=footway attributation.