style(lib): address ignored_unit_patterns lint

Cargo.toml

@@ -121,7 +121,6 @@ checked_conversions = "allow"
 else_if_without_else = "allow"
 enum_glob_use = "allow"
 float_arithmetic = "allow"
-ignored_unit_patterns = "allow"
 indexing_slicing = "allow"
 integer_division = "allow"
 integer_division_remainder_used = "allow"

src/client/dispatch.rs

@@ -111,7 +111,7 @@ impl<T, U> Sender<T, U> {
         let (tx, rx) = oneshot::channel();
         self.inner
             .send(Envelope(Some((val, Callback::Retry(Some(tx))))))
-            .map(move |_| rx)
+            .map(move |()| rx)
             .map_err(|mut e| (e.0).0.take().expect("envelope not dropped").0)
     }
 
@@ -123,7 +123,7 @@ impl<T, U> Sender<T, U> {
         let (tx, rx) = oneshot::channel();
         self.inner
             .send(Envelope(Some((val, Callback::NoRetry(Some(tx))))))
-            .map(move |_| rx)
+            .map(move |()| rx)
             .map_err(|mut e| (e.0).0.take().expect("envelope not dropped").0)
     }
 
@@ -150,15 +150,15 @@ impl<T, U> UnboundedSender<T, U> {
         let (tx, rx) = oneshot::channel();
         self.inner
             .send(Envelope(Some((val, Callback::Retry(Some(tx))))))
-            .map(move |_| rx)
+            .map(move |()| rx)
             .map_err(|mut e| (e.0).0.take().expect("envelope not dropped").0)
     }
 
     pub(crate) fn send(&mut self, val: T) -> Result<Promise<U>, T> {
         let (tx, rx) = oneshot::channel();
         self.inner
             .send(Envelope(Some((val, Callback::NoRetry(Some(tx))))))
-            .map(move |_| rx)
+            .map(move |()| rx)
             .map_err(|mut e| (e.0).0.take().expect("envelope not dropped").0)
     }
 }

src/proto/h1/io.rs

@@ -240,7 +240,7 @@ where
         let dst = unsafe { self.read_buf.chunk_mut().as_uninit_slice_mut() };
         let mut buf = ReadBuf::uninit(dst);
         match Pin::new(&mut self.io).poll_read(cx, buf.unfilled()) {
-            Poll::Ready(Ok(_)) => {
+            Poll::Ready(Ok(())) => {
                 let n = buf.filled().len();
                 trace!("received {} bytes", n);
                 // Safety: we just read that many bytes into the