chore(lib): remove redundant reference

Author: tottoto

src/error.rs

@@ -229,7 +229,7 @@ impl Error {
     pub(crate) fn find_source<E: StdError + 'static>(&self) -> Option<&E> {
         let mut cause = self.source();
         while let Some(err) = cause {
-            if let Some(ref typed) = err.downcast_ref() {
+            if let Some(typed) = err.downcast_ref() {
                 return Some(typed);
             }
             cause = err.source();

src/proto/h1/role.rs

@@ -167,7 +167,7 @@ impl Http1Transaction for Server {
                         Version::HTTP_10
                     };
 
-                    record_header_indices(bytes, &req.headers, &mut headers_indices)?;
+                    record_header_indices(bytes, req.headers, &mut headers_indices)?;
                     headers_len = req.headers.len();
                 }
                 Ok(httparse::Status::Partial) => return Ok(None),
@@ -955,7 +955,7 @@ impl Http1Transaction for Client {
                         } else {
                             Version::HTTP_10
                         };
-                        record_header_indices(bytes, &res.headers, &mut headers_indices)?;
+                        record_header_indices(bytes, res.headers, &mut headers_indices)?;
                         let headers_len = res.headers.len();
                         (len, status, reason, version, headers_len)
                     }

src/proto/h2/client.rs

@@ -135,7 +135,7 @@ where
 
     let conn_drop_rx = rx.into_future();
 
-    let ping_config = new_ping_config(&config);
+    let ping_config = new_ping_config(config);
 
     let (conn, ping) = if ping_config.is_enabled() {
         let pp = conn.ping_pong().expect("conn.ping_pong");

src/proto/h2/mod.rs

@@ -44,7 +44,7 @@ const CONNECTION_HEADERS: [HeaderName; 5] = [
 ];
 
 fn strip_connection_headers(headers: &mut HeaderMap, is_request: bool) {
-    for header in &CONNECTION_HEADERS {
+    for header in CONNECTION_HEADERS {
         if headers.remove(header).is_some() {
             warn!("Connection header illegal in HTTP/2: {}", header.as_str());
         }