Auto Update Magic is a kind of marketing name for AutoPkgr + Jamf policies (https://github.com/homebysix/auto-update-magic), the former of which is an application that would need to run on a separate system, like an admin box somewhere, since it uses the API to do most of its work. I would look for anything that might have that application (AutoPkgr) running on it, and turn that off if needed. I don't know for sure that these policies and smart groups are actually coming from AutoPkgr, since I've never used it, but hopefully the above will get you on the right path to tracking down where these are coming from.
