Latin Plus: .lf Lining Figures?

GF Latin Plus includes lining figures via the `.lf` suffix. Are these still necessary if my default figures are lining figures?

To my understanding, the feature code will still be automatically generated since Glyphs App can detect the type of default figures.

The issue mentions GF Latin Plus, the `.lf` suffix, and Glyphs App, but names no repository file, test, or entry point. First resolve whether `.lf` should remain when default figures are lining figures; done means a documented convention and an identified location for any resulting change.

Written by the indexing model from the issue text.