chore: clippy suggestions

crates/shadowsocks-service/src/local/tun/mod.rs

@@ -88,7 +88,7 @@ impl TunBuilder {
     pub async fn build(mut self) -> io::Result<Tun> {
         self.tun_config.layer(Layer::L3).up();
 
-        #[cfg(any(target_os = "linux"))]
+        #[cfg(target_os = "linux")]
         self.tun_config.platform(|tun_config| {
             // IFF_NO_PI preventing excessive buffer reallocating
             tun_config.packet_information(false);

crates/shadowsocks-service/src/local/tun/tcp.rs

@@ -538,7 +538,7 @@ impl TcpTun {
     }
 
     pub async fn drive_interface_state(&mut self, frame: &[u8]) {
-        if let Err(..) = self.iface_tx.send(frame.to_vec()) {
+        if self.iface_tx.send(frame.to_vec()).is_err() {
             panic!("interface send channel closed unexpectly");
         }
 

crates/shadowsocks-service/src/local/tun/virt_device.rs

@@ -62,7 +62,7 @@ impl Device for VirtTunDevice {
         if let Ok(buffer) = self.in_buf.try_recv() {
             let rx = Self::RxToken {
                 buffer,
-                phantom_device: PhantomData::default(),
+                phantom_device: PhantomData,
             };
             let tx = VirtTxToken(self);
             return Some((rx, tx));