Apply clippy suggestions

src/tun2proxy.rs

@@ -256,7 +256,6 @@ impl<'a> TunToProxy<'a> {
                 .unwrap()
                 .consume(slice.len(), |buf| {
                     buf[..].clone_from_slice(slice);
-                    ()
                 });
         }
     }
@@ -443,7 +442,6 @@ impl<'a> TunToProxy<'a> {
             while let Some((rx_token, _)) = self.tun.receive(Instant::now()) {
                 rx_token.consume(|frame| {
                     self.receive_tun(frame);
-                    ()
                 });
             }
         }

src/virtdevice.rs

@@ -24,7 +24,7 @@ pub struct VirtRxToken {
     buffer: Vec<u8>,
 }
 
-impl<'a> phy::RxToken for VirtRxToken {
+impl phy::RxToken for VirtRxToken {
     fn consume<R, F>(mut self, f: F) -> R
     where
         F: FnOnce(&mut [u8]) -> R,
@@ -69,7 +69,7 @@ impl Device for VirtualTunDevice {
     }
 }
 
-impl<'a> VirtualTunDevice {
+impl VirtualTunDevice {
     pub fn new(capabilities: DeviceCapabilities) -> Self {
         Self {
             capabilities,