In Glyphs it’s currently possible to restrict a list to those that contain a keyword. The opposite scenario where you want to remove glyphs that contain a keyword from a list, does not appear to currently be possible.
That can be done with a compound predicate. Hold the option key and click the “+” at the top right. This will add another “All” popup. Change that to “None” and then put whatever query you like under it.
Thanks, that worked.