Hi Todd,
I was able to remove the tracks without breaking the glass by placing a piece of paper board over the glass to protect it and CAREFULLY used a small hammer and a squared off punch to knock the channel loose. You'll likely need to alternate which end and side of the track to tap on and take your time but it is possible. If it is stubborn, you could also heat the channel with a small propane torch to help break it loose. Having said all of that, if the glass breaks it's not the end of the world.
-Tyler