Fix a unit test broken by fix for 2195

src/test/test_dir.c

@@ -150,7 +150,6 @@ test_dir_formats(void)
    * uptime, that still wouldn't make it right, because the two
    * descriptors might be made on different seconds... hm. */
          "bandwidth 1000 5000 10000\n"
-          "opt extra-info-digest 0000000000000000000000000000000000000000\n"
           "onion-key\n", sizeof(buf2));
   strlcat(buf2, pk1_str, sizeof(buf2));
   strlcat(buf2, "signing-key\n", sizeof(buf2));