erp5: remove a TODO about varnish

We will not do this

stack/erp5/buildout.hash.cfg

@@ -90,7 +90,7 @@ md5sum = 2f3ddd328ac1c375e483ecb2ef5ffb57
 
 [template-balancer]
 filename = instance-balancer.cfg.in
-md5sum = 0097e49b5bd7ad4978c722c1cdd27d6c
+md5sum = d85b16d0da2f932489fb7ae4b6d13f1e
 
 [template-haproxy-cfg]
 filename = haproxy.cfg.in

stack/erp5/instance-balancer.cfg.in

@@ -7,9 +7,6 @@
 XXX: This template only supports exactly one IPv4 and (if ipv6 is used) one IPv6
 per partition. No more (undefined result), no less (IndexError).
 -#}
-# TODO: insert varnish between apache & haproxy.
-# And think of a way to specify which urls goe through varnish, which go
-# directly to haproxy. (maybe just passing literal configuration file chunk)
 {% set ipv4 = (ipv4_set | list)[0] -%}
 {% set apache_ip_list = [ipv4] -%}
 {% if ipv6_set -%}