Remove commented-out module-config line, it is already set to "validator

iterator" by default.  Pointed out by Patrik Lundin.

src/etc/unbound.conf

@@ -1,4 +1,4 @@
-# $OpenBSD: unbound.conf,v 1.2 2014/03/21 00:23:15 sthen Exp $
+# $OpenBSD: unbound.conf,v 1.3 2014/03/23 12:25:26 sthen Exp $
 
 server:
 	interface: 127.0.0.1
@@ -16,7 +16,6 @@ server:
 
 	# Uncomment to enable DNSSEC validation.
 	#
-	#module-config: "validator iterator"
 	#auto-trust-anchor-file: "/var/unbound/db/root.key"
 
 	# Serve zones authoritatively from Unbound to resolver clients.