revert back from lan discovery merge

src/server.rs

@@ -7,7 +7,6 @@ use hbb_common::{
     config::{Config, CONNECT_TIMEOUT, RELAY_PORT},
     log,
     message_proto::*,
-    base_proto::*,
     protobuf::{Message as _, ProtobufEnum},
     rendezvous_proto::*,
     sleep,
@@ -28,7 +27,6 @@ mod connection;
 pub mod input_service;
 mod service;
 mod video_service;
-pub mod udp;
 
 use hbb_common::tcp::new_listener;
 
@@ -265,7 +263,6 @@ pub fn check_zombie() {
 
 #[tokio::main]
 pub async fn start_server(is_server: bool, _tray: bool) {
-    // TODO: Add a graceful shutdown handler, and attach all servers to that handler.
     #[cfg(target_os = "linux")]
     {
         log::info!("DISPLAY={:?}", std::env::var("DISPLAY"));
@@ -278,13 +275,6 @@ pub async fn start_server(is_server: bool, _tray: bool) {
                 std::process::exit(-1);
             }
         });
-        let _server_guard = match udp::start_udp_server().await {
-            Ok(s) => Some(s),
-            Err(e) => {
-                log::warn!("Failed to start udp server {}", e);
-                None
-            }
-        };
         input_service::fix_key_down_timeout_loop();
         crate::RendezvousMediator::start_all().await;
     } else {