So tracks under Lidl (in the East) can be expected to be definitely gone, right?

For tracks in the abandoned industrial area: based on aerials it is now demolished, with also railways fully removed (old Esri, new Esri, Geoportal etc).

From https://www.openstreetmap.org/node/1689132519 to the south railway remains to be present or traces of it remaining. Though tracks are almost certainly removed, you can see piles of sleepers on destroyed section.

Does it look accurate to you? Based on that I would propose to remove railways to the North from Karbacka and remove it to the South from Karpacka.