deleting things because theyre on private property isn't how this is dealt with. access=private is what people use. this is something thoroughly well laid out, you're not the first person to do this and certainly wont be the last. if you want to read more. if you want to read more about why here's a good wiki link https://wiki.openstreetmap.org/wiki/Why_we_won%27t_delete_roads_on_private_property