chore: clippy fix (#1890)

Author: AaronChen0

crates/shadowsocks/src/relay/udprelay/proxy_socket.rs

@@ -92,9 +92,7 @@ impl ProxySocket<ShadowUdpSocket> {
         context: SharedContext,
         svr_cfg: &ServerConfig,
     ) -> ProxySocketResult<ProxySocket<ShadowUdpSocket>> {
-        ProxySocket::connect_with_opts(context, svr_cfg, &DEFAULT_CONNECT_OPTS)
-            .await
-            .map_err(Into::into)
+        ProxySocket::connect_with_opts(context, svr_cfg, &DEFAULT_CONNECT_OPTS).await
     }
 
     /// Create a client to communicate with Shadowsocks' UDP server (outbound)
@@ -127,9 +125,7 @@ impl ProxySocket<ShadowUdpSocket> {
         context: SharedContext,
         svr_cfg: &ServerConfig,
     ) -> ProxySocketResult<ProxySocket<ShadowUdpSocket>> {
-        ProxySocket::bind_with_opts(context, svr_cfg, AcceptOpts::default())
-            .await
-            .map_err(Into::into)
+        ProxySocket::bind_with_opts(context, svr_cfg, AcceptOpts::default()).await
     }
 
     /// Create a `ProxySocket` binding to a specific address (inbound)
@@ -240,9 +236,7 @@ where
     /// Send a UDP packet to addr through proxy
     #[inline]
     pub async fn send(&self, addr: &Address, payload: &[u8]) -> ProxySocketResult<usize> {
-        self.send_with_ctrl(addr, &DEFAULT_SOCKET_CONTROL, payload)
-            .await
-            .map_err(Into::into)
+        self.send_with_ctrl(addr, &DEFAULT_SOCKET_CONTROL, payload).await
     }
 
     /// Send a UDP packet to addr through proxy with `ControlData`
@@ -391,9 +385,7 @@ where
 
     /// Send a UDP packet to target through proxy `target`
     pub async fn send_to(&self, target: SocketAddr, addr: &Address, payload: &[u8]) -> ProxySocketResult<usize> {
-        self.send_to_with_ctrl(target, addr, &DEFAULT_SOCKET_CONTROL, payload)
-            .await
-            .map_err(Into::into)
+        self.send_to_with_ctrl(target, addr, &DEFAULT_SOCKET_CONTROL, payload).await
     }
 
     /// Send a UDP packet to target through proxy `target`