[master] d4dafd5d9 build: Remove stale comment about varnishtest

[Dridi Boukelmoune]

commit d4dafd5d956ddd8901fc3af60dc49d8722080e46
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Mon Jul 11 11:20:52 2022 +0200

    build: Remove stale comment about varnishtest
    
    In the top makefile we make the check target depend on the all target,
    so we ensure that everything is built before we start using varnishtest.

diff --git a/bin/Makefile.am b/bin/Makefile.am
index f103fe94a..2d4185c48 100644
--- a/bin/Makefile.am
+++ b/bin/Makefile.am
@@ -1,7 +1,5 @@
 #
 
-# XXX: varnishtest MUST always be built last
-
 SUBDIRS = \
 	varnishadm \
 	varnishd \