Remove frozendict_json_encoder and support frozendicts everywhere

Not being able to serialise `frozendicts` is fragile, and it's annoying to have
to think about which serialiser you want. There's no real downside to
supporting frozendicts, so let's just have one json encoder.

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/http/server.py b/synapse/http/server.py

index 00b98af3d4..29dd604f85 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -620,7 +620,7 @@ def respond_with_json(
     if pretty_print:
         encoder = iterencode_pretty_printed_json
     else:
-        if canonical_json or synapse.events.USE_FROZEN_DICTS:
+        if canonical_json:
             encoder = iterencode_canonical_json
         else:
             encoder = _encode_json_bytes