Removed IUSE=doc because docs are only available in tarball published on
sourcefourge, not in auto tarballs from github; but versions after
1.28.1 are not available on sourcefourge, but only as git tags.
Signed-off-by: Alexey Sokolov <alexey+gentoo@asokolov.org>
Closes: https://github.com/gentoo/gentoo/pull/36111
Signed-off-by: Joonas Niilola <juippis@gentoo.org>