app-eselect/eselect-php: drop the "PHP5" backwards-compatibility shim.
A backwards-compatibility shim was added on 2016-01-05, in commit
1ae81f5, to prevent (unmodified) configurations from breaking when
upgrading eselect-php. A "you should upgrade your configuration"
warning was added three days later in commit
470b42d. I think two
years is a long enough time to maintain the shim/warning, so this
commit removes them from the live ebuild and latest revision.
Package-Manager: Portage-2.3.13, Repoman-2.3.3