2 files changed, 1 insertions, 3 deletions
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index 2aab9c5f55..8c53330c49 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -14,10 +14,10 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import json
 import logging
 from typing import Any, Callable, Dict, List, Match, Optional, Tuple, Union
 
+from canonicaljson import json
 from prometheus_client import Counter, Histogram
 
 from twisted.internet import defer
diff --git a/synapse/federation/sender/transaction_manager.py b/synapse/federation/sender/transaction_manager.py
index a2752a54a5..8280f8b900 100644
--- a/synapse/federation/sender/transaction_manager.py
+++ b/synapse/federation/sender/transaction_manager.py
@@ -61,8 +61,6 @@ class TransactionManager(object):
         # all the edus in that transaction. This needs to be done since there is
         # no active span here, so if the edus were not received by the remote the
         # span would have no causality and it would be forgotten.
-        # The span_contexts is a generator so that it won't be evaluated if
-        # opentracing is disabled. (Yay speed!)
 
         span_contexts = []
         keep_destination = whitelisted_homeserver(destination)