Just browsing the kde overlay and noticed the stale entries for marble-4.7.9x in package.use.mask, as of an overlay pull a few minutes ago. Those versions are long gone from the overlay, but the use masking got left behind. (Trivial severity as it shouldn't really affect anything, just a bit sloppy and needs cleaned up. If you don't want such reports in the future, just say so.)
Thanks, fixed.