[ISSUE #4633] Optimize the message body of the Rust SDK's returned re…

…ply message (#4751)

* optimized returned reply msg

* corrected the change

eventmesh-sdks/eventmesh-sdk-rust/src/grpc/grpc_consumer.rs

@@ -146,17 +146,6 @@ impl EventMeshGrpcConsumer {
                 let handled_msg = listener_inner.handle(eventmesh_message.unwrap());
                 if let Ok(msg_option) = handled_msg {
                     if let Some(_msg) = msg_option {
-                        let properties = HashMap::<String, String>::new();
-                        let reply = SubscriptionReply::new(
-                            EventMeshCloudEventUtils::get_subject(&received),
-                            EventMeshCloudEventUtils::get_subject(&received),
-                            EventMeshCloudEventUtils::get_data_content(&received),
-                            EventMeshCloudEventUtils::get_seq_num(&received),
-                            EventMeshCloudEventUtils::get_unique_id(&received),
-                            EventMeshCloudEventUtils::get_ttl(&received),
-                            None,
-                            properties,
-                        );
                         received.attributes.insert(
                             ProtocolKey::SUB_MESSAGE_TYPE.to_string(),
                             PbCloudEventAttributeValue {
@@ -165,8 +154,7 @@ impl EventMeshGrpcConsumer {
                                 )),
                             },
                         );
-                        received.data =
-                            Some(PbData::TextData(serde_json::to_string(&reply).unwrap()));
+                        received.data = None;
                         let _ = keeper.sender.send(received).await;
                     }
                 } else {