Address clippy lints

tarpc/src/client.rs

@@ -500,7 +500,6 @@ where
         // poll_next_request only returns Ready if there is room to buffer another request.
         // Therefore, we can call write_request without fear of erroring due to a full
         // buffer.
-        let request_id = request_id;
         let request = ClientMessage::Request(Request {
             id: request_id,
             message: request,

tarpc/src/server.rs

@@ -717,10 +717,7 @@ impl<Req, Res> InFlightRequest<Req, Res> {
                 },
         } = self;
         let method = serve.method(&message);
-        // TODO(https://github.com/rust-lang/rust-clippy/issues/9111)
-        // remove when clippy is fixed
-        #[allow(clippy::needless_borrow)]
-        span.record("otel.name", &method.unwrap_or(""));
+        span.record("otel.name", method.unwrap_or(""));
         let _ = Abortable::new(
             async move {
                 tracing::info!("BeginRequest");