I am not aware of anything ever mentioned relative to LC's xml file and I have never fooled with it.
So, looking at the xml it provides a lot of info relative to posting and operations and i will only guess that it used to
go directly into Mach when you post a file.
I never fool with it. The Lcam file saves specifics to the current file your working on and LC will open that Lcam file.
Why do you want to delete or fool with something you know nothing about ( includes me......

).

Said a different way, your on your own and feel free to explore. Please post your findings.
RICH