games-fps/chocolate-doom: [QA] unconditionally install completion files

QA policy [0] says that we don't conditionalise installation of
small files. It's a wasteful rebuild and inconsistent across packages
for when users desire completions to be available.

[0] https://projects.gentoo.org/qa/policy-guide/installed-files.html#pg0301
Signed-off-by: Sam James <sam@gentoo.org>

games-fps/chocolate-doom/chocolate-doom-3.0.1-r1.ebuild

@@ -1,9 +1,9 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
 
-PYTHON_COMPAT=( python3_{7,8,9} )
+PYTHON_COMPAT=( python3_{8,9} )
 
 inherit autotools prefix python-any-r1 xdg
 
@@ -15,7 +15,7 @@ SRC_URI="https://github.com/${PN}/${PN}/archive/${P}.tar.gz
 LICENSE="BSD GPL-2+"
 SLOT="0"
 KEYWORDS="~amd64 ~x86"
-IUSE="bash-completion doc libsamplerate +midi png vorbis"
+IUSE="doc libsamplerate +midi png vorbis"
 
 DEPEND="
 	media-libs/libsdl2[video]
@@ -24,8 +24,9 @@ DEPEND="
 	libsamplerate? ( media-libs/libsamplerate )
 	png? ( media-libs/libpng:= )"
 RDEPEND="${DEPEND}"
+# ${PYTHON_DEPS} for bash-completion
 BDEPEND="
-	bash-completion? ( ${PYTHON_DEPS} )
+	${PYTHON_DEPS}
 	doc? ( ${PYTHON_DEPS} )"
 
 S="${WORKDIR}/${PN}-${P}"
@@ -69,7 +70,7 @@ src_prepare() {
 
 src_configure() {
 	econf \
-		$(use_enable bash-completion) \
+		--enable-bash-completion \
 		$(use_enable doc) \
 		--disable-fonts \
 		--disable-icons \