chore: remove redundant import

src/client/legacy/client.rs

@@ -6,7 +6,7 @@
 
 use std::error::Error as StdError;
 use std::fmt;
-use std::future::{Future, poll_fn};
+use std::future::poll_fn;
 use std::pin::Pin;
 use std::task::{self, Poll};
 use std::time::Duration;

src/client/legacy/connect/dns.rs

@@ -21,7 +21,6 @@
 //! });
 //! ```
 use std::error::Error;
-use std::future::Future;
 use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6, ToSocketAddrs};
 use std::pin::Pin;
 use std::str::FromStr;
@@ -251,7 +250,6 @@ impl Iterator for SocketAddrs {
 }
 
 mod sealed {
-    use std::future::Future;
     use std::task::{self, Poll};
 
     use super::{Name, SocketAddr};
@@ -298,7 +296,6 @@ where
 #[cfg(test)]
 mod tests {
     use super::*;
-    use std::net::{Ipv4Addr, Ipv6Addr};
 
     #[test]
     fn test_ip_addrs_split_by_preference() {

src/client/legacy/connect/http.rs

@@ -1,6 +1,5 @@
 use std::error::Error as StdError;
 use std::fmt;
-use std::future::Future;
 use std::io;
 use std::marker::PhantomData;
 use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr};

src/client/legacy/connect/mod.rs

@@ -26,7 +26,7 @@
 //! Or, fully written out:
 //!
 //! ```
-//! use std::{future::Future, net::SocketAddr, pin::Pin, task::{self, Poll}};
+//! use std::{net::SocketAddr, pin::Pin, task::{self, Poll}};
 //! use http::Uri;
 //! use tokio::net::TcpStream;
 //! use tower_service::Service;
@@ -302,7 +302,6 @@ where
 
 pub(super) mod sealed {
     use std::error::Error as StdError;
-    use std::future::Future;
 
     use ::http::Uri;
     use hyper::rt::{Read, Write};

src/client/legacy/connect/proxy/socks/mod.rs

@@ -5,7 +5,6 @@ mod v4;
 pub use v4::{SocksV4, SocksV4Error};
 
 use pin_project_lite::pin_project;
-use std::future::Future;
 use std::pin::Pin;
 use std::task::{Context, Poll};
 

src/client/legacy/connect/proxy/tunnel.rs

@@ -1,6 +1,5 @@
 use std::error::Error as StdError;
-use std::future::Future;
-use std::marker::{PhantomData, Unpin};
+use std::marker::PhantomData;
 use std::pin::Pin;
 use std::task::{self, Poll, ready};
 

src/client/legacy/pool.rs

@@ -4,7 +4,6 @@ use std::collections::{HashMap, HashSet, VecDeque};
 use std::convert::Infallible;
 use std::error::Error as StdError;
 use std::fmt::{self, Debug};
-use std::future::Future;
 use std::hash::Hash;
 use std::ops::{Deref, DerefMut};
 use std::pin::Pin;
@@ -841,7 +840,6 @@ impl<T> WeakOpt<T> {
 #[cfg(test)]
 mod tests {
     use std::fmt::Debug;
-    use std::future::Future;
     use std::hash::Hash;
     use std::pin::Pin;
     use std::task::{self, Poll};

src/client/pool/cache.rs

@@ -20,7 +20,6 @@ pub use self::internal::Cached;
 mod internal {
     use std::collections::VecDeque;
     use std::fmt;
-    use std::future::Future;
     use std::pin::Pin;
     use std::sync::{Arc, Mutex, Weak};
     use std::task::{self, Poll, Waker, ready};
@@ -631,7 +630,6 @@ mod tests {
     // (FIFO), so a waiter cannot be starved by later arrivals.
     #[tokio::test]
     async fn test_waiters_woken_in_fifo_order() {
-        use std::future::Future;
         use std::task::{Context, Poll, Waker};
 
         let (mock, mut handle) = tower_test::mock::pair::<u32, &'static str>();
@@ -697,7 +695,6 @@ mod tests {
 
     #[tokio::test]
     async fn dropped_racing_future_cancels_waiter() {
-        use std::future::Future;
         use std::task::{Context, Poll, Waker};
 
         let (mock, mut handle) = tower_test::mock::pair::<u32, &'static str>();
@@ -825,7 +822,6 @@ mod tests {
 
     #[tokio::test]
     async fn idle_return_wakes_pending_poll_ready() {
-        use std::future::Future;
         use std::sync::atomic::AtomicBool;
         use std::task::{Context, Waker};
 

src/client/pool/negotiate.rs

@@ -46,7 +46,6 @@ pub use self::internal::Negotiate;
 pub use self::internal::Negotiated;
 
 mod internal {
-    use std::future::Future;
     use std::pin::Pin;
     use std::sync::{Arc, Mutex};
     use std::task::{self, Poll, ready};

src/client/pool/singleton.rs

@@ -159,7 +159,6 @@ where
 /// local to the future that was dropped.
 mod internal {
     use std::fmt;
-    use std::future::Future;
     use std::pin::Pin;
     use std::sync::{Arc, Mutex, Weak};
     use std::task::{self, Poll, Waker};
@@ -507,7 +506,6 @@ mod internal {
 #[cfg(test)]
 mod tests {
     use std::error::Error;
-    use std::future::Future;
     use std::pin::Pin;
     use std::task::Poll;
 

src/common/exec.rs

@@ -2,7 +2,6 @@
 
 use hyper::rt::Executor;
 use std::fmt;
-use std::future::Future;
 use std::pin::Pin;
 use std::sync::Arc;
 

src/common/lazy.rs

@@ -1,6 +1,5 @@
 use pin_project_lite::pin_project;
 
-use std::future::Future;
 use std::pin::Pin;
 use std::task::{self, Poll};
 

src/rt/io.rs

@@ -1,4 +1,3 @@
-use std::marker::Unpin;
 use std::pin::Pin;
 use std::task::{Poll, ready};
 

src/rt/tokio.rs

@@ -52,7 +52,6 @@
 //! [tokio-async-docs]: https://docs.rs/tokio/latest/tokio/#asynchronous-io
 
 use std::{
-    future::Future,
     pin::Pin,
     task::{Context, Poll},
     time::{Duration, Instant},

src/server/conn/auto/mod.rs

@@ -3,7 +3,6 @@
 pub mod upgrade;
 
 use hyper::service::HttpService;
-use std::future::Future;
 use std::marker::PhantomPinned;
 use std::mem::MaybeUninit;
 use std::pin::Pin;

src/server/graceful.rs

@@ -8,7 +8,6 @@
 
 use std::{
     fmt::{self, Debug},
-    future::Future,
     pin::Pin,
     task::{self, Poll},
 };

src/service/glue.rs

@@ -1,6 +1,5 @@
 use pin_project_lite::pin_project;
 use std::{
-    future::Future,
     pin::Pin,
     task::{Context, Poll},
 };

src/service/oneshot.rs

@@ -1,5 +1,4 @@
 use pin_project_lite::pin_project;
-use std::future::Future;
 use std::pin::Pin;
 use std::task::{Context, Poll, ready};
 use tower_service::Service;

tests/test_utils/mod.rs

@@ -1,4 +1,3 @@
-use std::future::Future;
 use std::pin::Pin;
 use std::sync::Arc;
 use std::sync::atomic::{AtomicUsize, Ordering};