distutils-r1.eclass: Do not modify the HOME variable

This was only necessary when we ran phases in parallel.
Also, PMS says this variable should not be modified.

eclass/distutils-r1.eclass

@@ -637,12 +637,6 @@ distutils-r1_run_phase() {
 	# in the sys.path_importer_cache)
 	mkdir -p "${BUILD_DIR}/lib" || die
 
-	# We need separate home for each implementation, for .pydistutils.cfg.
-	if [[ ! ${DISTUTILS_SINGLE_IMPL} ]]; then
-		local -x HOME=${HOME}/${EPYTHON}
-		mkdir -p "${HOME}" || die
-	fi
-
 	# Set up build environment, bug #513664.
 	local -x AR=${AR} CC=${CC} CPP=${CPP} CXX=${CXX}
 	tc-export AR CC CPP CXX