Hello,
Could you explain reason for adding this non-existent railway section to OSM?

Per Wiki (https://wiki.openstreetmap.org/wiki/Tag:railway=abandoned?uselang=en) the tag shouldn't be used for cases where no physical evidence is existing. I'm quite familiar with area in question and there are no visible markings (no sleepers, no signals) left.

I agree that historically the railway was there, but OSM.org isn't a store for historical data.