Remove serde_derive https://github.com/serde-rs/serde/issues/1441#issuecomment-445481084

websocket-tcp-chat/src/client.rs

@@ -1,6 +1,3 @@
-#[macro_use]
-extern crate serde_derive;
-
 use actix::prelude::*;
 use std::str::FromStr;
 use std::time::Duration;

websocket-tcp-chat/src/codec.rs

@@ -5,6 +5,7 @@ use actix::prelude::*;
 use actix_codec::{Decoder, Encoder};
 use byteorder::{BigEndian, ByteOrder};
 use bytes::{BufMut, BytesMut};
+use serde::{Deserialize, Serialize};
 use serde_json as json;
 
 /// Client request

websocket-tcp-chat/src/main.rs

@@ -1,5 +1,4 @@
-#[macro_use]
-extern crate serde_derive;
+use serde::{Deserialize, Serialize};
 
 use std::time::{Duration, Instant};