diff --git a/tower/src/balance.rs b/tower/src/balance.rs
index f4775ec..cdb1199 100644
--- a/tower/src/balance.rs
+++ b/tower/src/balance.rs
@@ -41,10 +41,6 @@ where
         <D::Service as Service<Req>>::Future,
         fn(<D::Service as Service<Req>>::Error) -> crate::BoxError,
     >;
-
-    fn poll_ready(&mut self) -> Poll<Result<(), Self::Error>> {
-        todo!()
-    }
 }
 
 pub struct PoolDiscoverer<MS, Target, Request>
@@ -102,21 +98,12 @@ where
     type Response = <PinBalance<PoolDiscoverer<MS, Target, Req>, Req> as Service<Req>>::Response;
     type Error = <PinBalance<PoolDiscoverer<MS, Target, Req>, Req> as Service<Req>>::Error;
     type Future = <PinBalance<PoolDiscoverer<MS, Target, Req>, Req> as Service<Req>>::Future;
-
-    fn poll_ready(&mut self) -> Poll<Result<(), Self::Error>> {
-        todo!()
-    }
 }
 
 pub struct DropNotifyService<Svc> {
     svc: Svc,
 }
 
-impl<Svc> Drop for DropNotifyService<Svc> {
-    fn drop(&mut self) {
-        todo!()
-    }
-}
 
 impl<Svc: Load> Load for DropNotifyService<Svc> {
     type Metric = Svc::Metric;
@@ -130,7 +117,4 @@ impl<Request, Svc: Service<Request>> Service<Request> for DropNotifyService<Svc>
     type Future = Svc::Future;
     type Error = Svc::Error;
 
-    fn poll_ready(&mut self) -> Poll<Result<(), Self::Error>> {
-        todo!()
-    }
 }
diff --git a/tower/src/lib.rs b/tower/src/lib.rs
index f6b743d..3789eeb 100644
--- a/tower/src/lib.rs
+++ b/tower/src/lib.rs
@@ -3,6 +3,8 @@
 pub mod balance;
 pub mod make;
 
+use std::future::Future;
+use futures_core::TryStream;
 pub trait Sealed<T> {}
 
 /// Alias for a type-erased error type.
@@ -15,11 +17,6 @@ mod load {
     }
 }
 
-use std::future::Future;
-use std::task::Poll;
-
-use futures_core::TryStream;
-
 pub trait Discover {
     type Key: Eq;
     type Service;
@@ -54,6 +51,4 @@ pub trait Service<Request> {
 
     /// The future response value.
     type Future: Future<Output = Result<Self::Response, Self::Error>>;
-
-    fn poll_ready(&mut self) -> Poll<Result<(), Self::Error>>;
 }
diff --git a/tower/src/make.rs b/tower/src/make.rs
index bac5875..958277a 100644
--- a/tower/src/make.rs
+++ b/tower/src/make.rs
@@ -2,7 +2,6 @@
 
 use crate::Sealed;
 use crate::Service;
-use std::task::Poll;
 
 use std::convert::Infallible;
 
@@ -17,10 +16,6 @@ where
     type Response = S;
     type Error = Infallible;
     type Future = SharedFuture<S>;
-
-    fn poll_ready(&mut self) -> Poll<Result<(), Self::Error>> {
-        todo!()
-    }
 }
 
 pub struct SharedFuture<S> {
@@ -29,10 +24,10 @@ pub struct SharedFuture<S> {
 
 impl<S> std::future::Future for SharedFuture<S>
 where
-    futures_util::future::Ready<Result<S, Infallible>>: std::future::Future,
+    std::future::Ready<Result<S, Infallible>>: std::future::Future,
 {
     type Output =
-        <futures_util::future::Ready<Result<S, Infallible>> as std::future::Future>::Output;
+        <std::future::Ready<Result<S, Infallible>> as std::future::Future>::Output;
 
     fn poll(
         self: std::pin::Pin<&mut Self>,