don't update dir_info_status when we have minimum dir info

Nothing ever uses the string when we're in "have minimum dir info"
state. The flow of the function is "check for problems, if you see a
problem write an explanation to dir_info_status and set res to 0". If
you get to the end of the function without any problems, then res =
1 and we're all ready to start making circuits.

(Changed after consultation with Yawning.)

src/or/nodelist.c

@@ -1703,22 +1703,6 @@ update_router_have_minimum_dir_info(void)
       res = 0;
       control_event_bootstrap(BOOTSTRAP_STATUS_REQUESTING_DESCRIPTORS, 0);
       goto done;
-    } else {
-      /* these messages can be excessive in testing networks */
-      static ratelim_t last_warned =
-      RATELIM_INIT(NOTICE_DIR_INFO_STATUS_INTERVAL);
-      char *suppression_msg = NULL;
-
-      tor_snprintf(dir_info_status, sizeof(dir_info_status),
-                   "We have enough %sdescriptors: we have %d/%d, and "
-                   "can build %d%% of likely paths. (We have %s.)",
-                   using_md?"micro":"", num_present, num_usable,
-                   (int)(paths*100), status);
-
-      if ((suppression_msg = rate_limit_log(&last_warned, time(NULL)))) {
-        log_info(LD_NET, "%s%s", dir_info_status, suppression_msg);
-        tor_free(suppression_msg);
-      }
     }
 
     tor_free(status);