mail-filter/postgrey: Drop unnecessary hack for socket permissions

postgrey --help says:
         --socketmode=MODE   unix socket permission (default 0666)

and indeed the socket is created with the correct a+rw,a-x permissions.
The hack in start() is therefore redundant and can be dropped.

Bug: https://bugs.gentoo.org/603258
Part-of: https://codeberg.org/gentoo/gentoo/pulls/1065
Merges: https://codeberg.org/gentoo/gentoo/pulls/1065
Signed-off-by: Ulrich Müller <ulm@gentoo.org>

mail-filter/postgrey/files/postgrey-1.37.initd

@@ -56,12 +56,6 @@ start() {
 	checkconfig || return 1
 	ebegin "Starting Postgrey"
 
-	# HACK -- start a subshell and corrects perms on the socket...
-	if [ "x${POSTGREY_TYPE}" = "xunix" ]; then
-		rm -f ${POSTGREY_SOCKET}
-		( while ! test -S ${POSTGREY_SOCKET}; do sleep 1; done; chmod a+rw,a-x ${POSTGREY_SOCKET} ) &
-	fi
-
 	if [ -z ${POSTGREY_DELAY} ] ; then
 		POSTGREY_DELAY_ARG=""
 	else