app-misc/arttime: QA Fixes

Fix UnknownUseFlags ('notify') by dropping the USE.
It should be an optfeature anyway.

Signed-off-by: Matt Jolly <kangie@gentoo.org>

app-misc/arttime/arttime-2.3.4.ebuild

@@ -3,6 +3,8 @@
 
 EAPI=8
 
+inherit optfeature
+
 DESCRIPTION="CLI application that blends beauty of ASCII"
 HOMEPAGE="https://github.com/poetaman/arttime"
 SRC_URI="https://github.com/poetaman/${PN}/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
@@ -10,11 +12,9 @@ SRC_URI="https://github.com/poetaman/${PN}/archive/refs/tags/v${PV}.tar.gz -> ${
 LICENSE="all-rights-reserved"
 SLOT="0"
 KEYWORDS="~amd64"
-IUSE="notify"
 
 DEPEND="
 	app-shells/zsh
-	notify? ( x11-libs/libnotify )
 "
 RDEPEND="
 	${DEPEND}
@@ -26,7 +26,6 @@ src_prepare() {
 	gunzip share/man/man1/artprint.1.gz || die
 }
 
-
 src_install() {
 	dobin bin/arttime
 	dobin bin/artprint
@@ -41,3 +40,7 @@ src_install() {
 
 	dodoc README.md
 }
+
+pkg_postinst() {
+	optfeature "Desktop notifications" x11-libs/libnotify
+}