security/nss: Revert "Add TODO about ca_root_nss PORTREVISION"

This reverts commit 778fa2dc.

Sorry for misreading ca_root_nss/Makefile's PORTVERSION.

Reported by:	sunpoet@

security/nss/Makefile

 # Created by: Maxim Sobolev <sobomax@FreeBSD.org>
 
 PORTNAME=	nss
-PORTVERSION=	3.69	# when bumping this, please reset PORTREVISION in ../ca_root_nss/Makefile
+PORTVERSION=	3.69
 CATEGORIES=	security
 MASTER_SITES=	MOZILLA/security/${PORTNAME}/releases/${DISTNAME:tu:C/[-.]/_/g}_RTM/src