dev-python/six: Remove pkg_setup check

Running python_foreach_impl from pkg_setup causes more problems
than it is worth.

Bug: https://bugs.gentoo.org/569962

Package-Manager: portage-2.2.26_p32

dev-python/six/six-1.10.0.ebuild

@@ -26,16 +26,6 @@ PATCHES=(
 	"${FILESDIR}"/1.9.0-mapping.patch
 	)
 
-pkg_setup() {
-	six_dir_check() {
-		local dir="${ROOT%/}$(python_get_sitedir)"/six
-		if [[ -d "${dir}" ]]; then
-			die "${PN} doesn't work if ${dir} is a directory #546730"
-		fi
-	}
-	python_foreach_impl six_dir_check
-}
-
 python_prepare_all() {
 	# https://bitbucket.org/gutworth/six/issues/139/
 	sed \