dev-perl/Carp-Clan: Bump to version 6.80.0

dev-perl/Carp-Clan: Bump to version 6.80.0

- EAPI7
- Remove useless/empty variable assignments

Upstream:
- fix warning in bad test
- speed up code by removing pre perl 5.5 accommodations
- Massive amounts of retooling based changes, which I specifically tried
  to avoid when I was the previous releaser, but the new releaser saught
  fit to create a massive amount of churn in the name of modernity, and
  I cannot feasibly explain each and every one of these bogus
  improvements, because practically every line of every file has been
  changed, according to diff. (Irritatated=True)

Package-Manager: Portage-2.3.99, Repoman-2.3.22
Signed-off-by: Kent Fredric <kentnl@gentoo.org>