Rodney
You came up with a great idea for when you have a lot of video audio "grouped" or "linked" files on that Timeline and you want to get rid of the "grouped" or "linked" audio with "Delete Audio" command. Good job working that into your workflow.
Just in case note...
if you have a lone audio file on Audio 1, there is no "Delete Audio" in the pop up menu when you right click the file.
if you have video grouped with audio that has been grouped with Clip Menu/Group, that will have a "Delete Audio" in the pop up of the right click.
Continued success with your projects.
ATR