avahi: Don't remove users/groups in postrm

There's no way to ensure that files owned by the users aren't left
on the system at postrm time: Removing the user would mean those
files are now owned by a non-existing user, and later may be owned
by a completely unrelated new user.

[YOCTO #10442]

(From OE-Core rev: c1be2196e7ffb23b7b243ecd8aca1827cbdfa443)

Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/avahi/avahi.inc

@@ -153,13 +153,3 @@ if [ -z "$D" ]; then
 	killall -q -HUP dbus-daemon || true
 fi
 }
-
-pkg_postrm_avahi-daemon () {
-	deluser avahi || true
-	delgroup avahi || true
-}
-
-pkg_postrm_avahi-autoipd () {
-	deluser avahi-autoipd || true
-	delgroup avahi-autoipd || true
-}