1 files changed, 0 insertions, 2 deletions
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index 69d833585f..e67af6463f 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -687,8 +687,6 @@ class FederationServer(FederationBase):
         time_now = self._clock.time_msec()
         event_json = event.get_pdu_json(time_now)
         resp = {
-            # TODO Remove the unstable prefix when servers have updated.
-            "org.matrix.msc3083.v2.event": event_json,
             "event": event_json,
             "state": [p.get_pdu_json(time_now) for p in state_events],
             "auth_chain": [p.get_pdu_json(time_now) for p in auth_chain_events],