As was previously announced on 2015-06-24 [1], depend.php.eclass was
deprecated.

The tree is now clear of its use.

The eclass will be removed in 30 days.

All overlays are advised to update their ebuilds at this time.

Thank you,

Brian Evans

[1]
https://archives.gentoo.org/gentoo-dev-announce/message/cdf630c469a533e5f21c6df74b2de9cc