dev-python/importlib_metadata: Use distutils_enable_sphinx

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/importlib_metadata/importlib_metadata-0.23-r1.ebuild

@@ -14,7 +14,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 LICENSE="Apache-2.0"
 SLOT="0"
 KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sparc ~x86"
-IUSE="doc test"
+IUSE="test"
 
 RDEPEND="
 	dev-python/zipp[${PYTHON_USEDEP}]
@@ -29,29 +29,17 @@ BDEPEND="
 		$(python_gen_cond_dep 'dev-python/importlib_resources[${PYTHON_USEDEP}]' pypy{,3} python{2_7,3_{5,6}})
 		dev-python/packaging[${PYTHON_USEDEP}]
 	)
-	doc? (
-		$(python_gen_any_dep '>=dev-python/rst-linker-1.9[${PYTHON_USEDEP}]')
-		$(python_gen_any_dep 'dev-python/sphinx[${PYTHON_USEDEP}]')
-	)
 "
 
 PATCHES=(
 	"${FILESDIR}/importlib_metadata-0.23-py38.patch"
 )
 
+distutils_enable_sphinx "${PN}/docs" \
+	'>=dev-python/rst-linker-1.9'
 distutils_enable_tests unittest
 
-python_check_deps() {
-	if use doc; then
-		has_version ">=dev-python/rst-linker-1.9[${PYTHON_USEDEP}]" || return ${?}
-		has_version "dev-python/sphinx[${PYTHON_USEDEP}]" || return ${?}
-	fi
-	return 0
-}
-
 python_prepare_all() {
-	sed -i "/'sphinx.ext.intersphinx'/d" ${PN}/docs/conf.py || die
-
 	# avoid a setuptools_scm dependency
 	sed -i "s:use_scm_version=True:version='${PV}',name='${PN//-/.}':" setup.py || die
 	sed -r -i "s:setuptools(_|-)scm[[:space:]]*([><=]{1,2}[[:space:]]*[0-9.a-zA-Z]+|)[[:space:]]*::" \
@@ -59,10 +47,3 @@ python_prepare_all() {
 
 	distutils-r1_python_prepare_all
 }
-
-python_compile_all() {
-	if use doc; then
-		sphinx-build ${PN}/docs docs/_build/html || die
-		HTML_DOCS=( docs/_build/html/. )
-	fi
-}