[cupage] Removed stale 0.7.0-r1 ebuild

0.8.0 available before 0.7.0-r1 will be again.

Package-Manager: portage-2.1.12.2
Manifest-Sign-Key: C0174749
[cupage] Drop Python 3.x support for upstream compatibility

There really isn't a nice way to handle this when packages become available
upstream, but please accept my apologies still :/

Package-Manager: portage-2.1.12.2
Manifest-Sign-Key: C0174749
Update metadata cache for upstream's eclass changes