Remove track?

Hello, Brian. I hate to say it, but it does look like your track is part of the threshold. Unless there is some detail I'm missing I don't see an easy way to remove it, if it's even possible.

If the only issue is that the track is worn out, though, then you may be able to get away with a track cover like our 80-102. These are used on worn or dented tracks to help give them a nice even roll again. The video below will go into more detail as to how these work.