Hey there. 

According to the wiki railway=abandoned should only be used if "the route is still visible with ties/sleepers, signals or other railroad right of way signs or infrastructure". No such physical signs seem to remain for the former rails in Bamban. Most of the right-of-way has either been replaced with streets or is covered with buildings.

At most some secondary recognisable traces like earthworks are visible which would match the wiki description of railway=razed.