sci-libs/cbflib: Doesn't compile with GCC-10 or GCC-11. Was never ported
to work with GCC-10+. sci-chemistry/rasmol depends on cbflib.

Both packages have updates ignored in Gentoo, and their ebuilds pretty
much untouched during git-era. Both had their latest upstream version
release in 2018.

Both EAPI-5 etc.

Removal in ~30 days. Bug: https://bugs.gentoo.org/788508

-- juippis