OSM is not a map of non private data.  We just map what is on the ground and change the access tags to change how people use it.

The path's access tag has been changed to private.  This will prevent any routers used by the general public from using it and prevent people from re-adding it as public.

See here for more explanation.
https://wiki.openstreetmap.org/wiki/Why_we_won%27t_delete_roads_on_private_property