We don't need the leave event after all

federationapi/api/api.go

@@ -181,7 +181,6 @@ type PerformLeaveRequest struct {
 }
 
 type PerformLeaveResponse struct {
-	Event *gomatrixserverlib.HeaderedEvent `json:"event"`
 }
 
 type PerformInviteRequest struct {

federationapi/internal/perform.go

@@ -561,7 +561,6 @@ func (r *FederationInternalAPI) PerformLeave(
 		}
 
 		r.statistics.ForServer(serverName).Success()
-		response.Event = event.Headered(respMakeLeave.RoomVersion)
 		return nil
 	}