5.5 not mirrored anymore removing

Package-Manager: portage-2.2.7
5.5 removal

Package-Manager: portage-2.2.7
5.5 removal

Package-Manager: portage-2.2.7
removing 5.5

Package-Manager: portage-2.2.7
remove old unused

Package-Manager: portage-2.2.7
remove unused pynac

Package-Manager: portage-2.2.7
5.5 removal

Package-Manager: portage-2.2.7
sage-5.5 mirror is no more.