One more prop271 XXX.

src/or/entrynodes.c

@@ -3347,7 +3347,6 @@ guards_retry_optimistic(const or_options_t *options)
   if (! entry_list_is_constrained(options))
     return 0;
 
-  // XXXX prop271 -- is this correct?
   mark_primary_guards_maybe_reachable(get_guard_selection_info());
 
   return 1;