fix CI clippy warnings (#1664)

awc/src/lib.rs

@@ -1,4 +1,4 @@
-#![warn(rust_2018_idioms, warnings)]
+#![deny(rust_2018_idioms)]
 #![allow(
     clippy::type_complexity,
     clippy::borrow_interior_mutable_const,

awc/src/sender.rs

@@ -193,11 +193,7 @@ impl RequestSender {
             }
         };
 
-        SendClientRequest::new(
-            fut,
-            response_decompress,
-            timeout.or_else(|| config.timeout),
-        )
+        SendClientRequest::new(fut, response_decompress, timeout.or(config.timeout))
     }
 
     pub(crate) fn send_json<T: Serialize>(