The doc-install function currently is designed to either use default paths when DOCS is unset, or use provided paths when DOCS is set. However, there's no explicit way of disabling doc-install completely. I'd like to request that DOCS=() and DOCS='' explicitly disable installing docs. With the current definition, they would result in 'dodoc' with no parameters.
In EAPI 6: https://gitweb.gentoo.org/proj/pms.git/commit/?id=1d699b5c40d334adc62fdb2e079851d8814b384b
*** Bug 480892 has been marked as a duplicate of this bug. ***