games-puzzle/hitori: remove wrong yelp-tools build depend

yelp-tools is only for developers, so an eautoreconf dep only, if even that.
However we do need itstool, which was pulled in recursively by yelp-tools.

Package-Manager: Portage-2.3.49, Repoman-2.3.10

games-puzzle/hitori/hitori-3.22.4.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2018 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
@@ -19,8 +19,8 @@ RDEPEND="
 	>=x11-libs/cairo-1.4
 "
 DEPEND="${RDEPEND}
-	app-text/yelp-tools
 	dev-libs/appstream-glib
+	dev-util/itstool
 	>=sys-devel/gettext-0.19.8
 	virtual/pkgconfig
 "