On most scenes that use the UVW Unwrap modifier, there will be cases where you might be wondering why you’re getting some maps in the Asset Tracking editor, but it isn’t used in any of the objects in the scene. Chances are that those maps are still inside the UVW Unwrap modifier’s internal texture list.
One way to remove those is to look for all your objects with the Unwrap modifier then collapse them down to an editable class.
But on some cases where collapsing is not an option, here’s a very handy short script that you can run.
for i in getClassInstances Unwrap_UVW do i.texMapList = #()
It will collect all the Unwrap modifiers then clear their texture map list.