I'm not familiar with the line you mention but as Conrail was formed, there was an extensive study done of every bit of track in all the components railroads. There was a Preliminary System Plan published which gave suggestions on which lines would be conveyed to Conrail and which would not. After comments, revisions and politics, a similar document, the Final System Plan was published listing what would and would not be included. In some cases, lines not included in CR were continued for a short time under state subsidy, and in other cases new railroads were formed to operate segments.
But on Day One, there were many lines which had seen their last train and were removed months or years later. I suspect the part you ask about was such a line.
For those interested, the USRA Final System Plan might be available on Amazon or eBay. It provides interesting info on line segments, stations on the lines, annual carloads, etc.