[master] editorial cleanup: removed a stale comment.

It was made as a hint what we'd do at the time we only had a framework
of UpdateSession.  Now that we've filled in it, we don't need the comment.

should be trivial, directly committing.

src/lib/python/isc/ddns/session.py

@@ -190,7 +190,6 @@ class UpdateSession:
         '''
         try:
             self.__get_update_zone()
-            # conceptual code that would follow
             prereq_result = self.__check_prerequisites()
             if prereq_result != Rcode.NOERROR():
                 self.__make_response(prereq_result)