Tweak imports in tests

Author: taiki-e

futures/tests/future_join.rs

@@ -1,5 +1,5 @@
 use futures::executor::block_on;
-use futures::future::Future;
+use futures::future::{self, Future};
 use std::task::Poll;
 
 /// This tests verifies (through miri) that self-referencing
@@ -21,7 +21,7 @@ async fn trouble() {
 
 fn yield_now() -> impl Future<Output = ()> {
     let mut yielded = false;
-    std::future::poll_fn(move |cx| {
+    future::poll_fn(move |cx| {
         if core::mem::replace(&mut yielded, true) {
             Poll::Ready(())
         } else {

futures/tests/future_try_join_all.rs

@@ -1,8 +1,7 @@
 use futures::executor::block_on;
+use futures::future::{err, ok, try_join_all, Future, TryJoinAll};
 use futures::pin_mut;
-use futures_util::future::{err, ok, try_join_all, TryJoinAll};
 use std::fmt::Debug;
-use std::future::Future;
 
 #[track_caller]
 fn assert_done<T>(actual_fut: impl Future<Output = T>, expected: T)