Remove Arla version from 53.html

Arla was removed last August.

Index: 53.html
===================================================================
RCS file: /cvs/www/53.html,v
retrieving revision 1.26
diff -u -r1.26 53.html
--- 53.html	14 Feb 2013 23:16:32 -0000	1.26
+++ 53.html	15 Feb 2013 10:05:22 -0000
@@ -252,7 +252,6 @@
     <li>Sudo 1.7.2p8
     <li>Ncurses 5.7
     <li>Heimdal 0.7.2 (+ patches)
-    <li>Arla 0.35.7
     <li>Binutils 2.15 (+ patches)
     <li>Gdb 6.3 (+ patches)
     <li>Less 444 (+ patches)