Now, that is what should be in the help menu. This was a much better description. It took me forever to get the answer.
When you go to your tracker, you need to click the Trackers icon in the upper right. It looks like a little chart. That should bring up a list of all the available trackers on MedHelp. You'll see your trackers listed below each one. Click the trash can next to the tracker you want to delete.