openqa_dispatcher: update a comment

roles/openqa/dispatcher/tasks/main.yml

@@ -16,10 +16,11 @@
 # When both of the above are set, a wikitcms 'credentials' file will
 # be created and result submission to the wiki will be enabled.
 #
-# NOTE: At present, as the scheduler code downloads the ISOs, it only
-# really makes sense for openqa_server boxes to be their own
-# openqa_dispatchers. However, this should be fixed in the scheduler
-# code soon, so the roles are kept separate to give future flexibility.
+# NOTE: There are still currently a couple of assumptions that the
+# openQA server boxes will always act as their own dispatchers, but
+# there is no longer any fundamental reason why this must be the case,
+# as we now use the openQA asset downloading capability so that the
+# scheduler is no longer responsible for downloading assets.
 
 - name: Install required packages
   dnf: name={{ item }} state=present