Agreed. OSM guidelines have established this time and time again - Only map what is actually on the ground, not what was once on the ground but no longer exists.

Feel free to remove it if there is no trace.  These should be on OHM anyhow.  I am honestly not sure why these types of non-existent features get the royal treatment, when they are no different from "abandoned buildings" that were demolished and replaced or "abandoned woods" that were cut down and turned into a new residential development.