Don't mention AFS in crypto.html

As far as I know, we do not do AFS anymore, so this can go away?

Index: crypto.html
===================================================================
RCS file: /cvs/www/crypto.html,v
retrieving revision 1.136
diff -u -r1.136 crypto.html
--- crypto.html	24 Feb 2011 08:41:50 -0000	1.136
+++ crypto.html	25 Mar 2013 15:42:37 -0000
@@ -212,8 +212,6 @@
     to provide confidentiality for the network layer.
 <li>In <a href="http://www.openbsd.org/cgi-bin/man.cgi?query=isakmpd&amp;sektion=8">isakmpd(8)</a>
     to protect the exchanges where IPsec key material is negotiated.
-<li>In AFS to protect the messages passing over the network, providing
-    confidentiality of remote filesystem access.
 <li>In libssl to let applications communicate over the de-facto standard
 	cryptographically secure SSL protocol.
 </ul>