mail-filter/courier-pythonfilter: Fix distutils QA issue

Closes: https://bugs.gentoo.org/751289
Signed-off-by: Hanno Böck <hanno@gentoo.org>
Package-Manager: Portage-3.0.9, Repoman-3.0.2

mail-filter/courier-pythonfilter/courier-pythonfilter-3.0.2-r1.ebuild

@@ -3,6 +3,7 @@
 
 EAPI=7
 PYTHON_COMPAT=( python3_{6,7,8,9} )
+DISTUTILS_USE_SETUPTOOLS=no
 inherit distutils-r1
 
 DESCRIPTION="Python filtering architecture for the Courier MTA"
@@ -14,6 +15,4 @@ SLOT="0"
 KEYWORDS="~amd64"
 IUSE=""
 
-RDEPEND="mail-mta/courier"
-DEPEND="${RDEPEND}
-	dev-python/setuptools[${PYTHON_USEDEP}]"
+DEPEND="mail-mta/courier"