Abandoned, razed, whatever. It should be let on the map to be visible as old tram network. Like here for example: https://www.openrailwaymap.org/?style=standard&lang=en&lat=50.362751981983266&lon=18.805460929870605&zoom=15
https://www.openstreetmap.org/way/687546805#map=14/50.3659/18.8300&layers=N

What you did is deleted the priceless history of this current tram network part, contained just in changsets history. And I pretty sure your changes should be reverted