chore: change default lint level to warning and deny warnings in CI (#1416)

tokio-sync/src/lib.rs

@@ -1,11 +1,10 @@
 #![doc(html_root_url = "https://docs.rs/tokio-sync/0.2.0-alpha.1")]
-#![deny(
+#![warn(
     missing_debug_implementations,
     missing_docs,
     unreachable_pub,
     rust_2018_idioms
 )]
-#![cfg_attr(test, deny(warnings))]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
 #![feature(async_await)]
 

tokio-sync/src/watch.rs

@@ -60,14 +60,16 @@ use crate::task::AtomicWaker;
 use core::task::Poll::{Pending, Ready};
 use core::task::{Context, Poll};
 use fnv::FnvHashMap;
-use futures_core::ready;
 use futures_util::future::poll_fn;
-use futures_util::pin_mut;
 use std::ops;
 use std::sync::atomic::AtomicUsize;
 use std::sync::atomic::Ordering::SeqCst;
 use std::sync::{Arc, Mutex, RwLock, RwLockReadGuard, Weak};
 
+#[cfg(feature = "async-traits")]
+use futures_core::ready;
+#[cfg(feature = "async-traits")]
+use futures_util::pin_mut;
 #[cfg(feature = "async-traits")]
 use std::pin::Pin;