Fix warnings

src/client.rs

@@ -1,11 +1,11 @@
-use {frame, proto, Frame, Peer, ConnectionError, StreamId};
+use {frame, proto, Peer, ConnectionError, StreamId};
 
 use http;
-
 use futures::{Future, Poll};
-
 use tokio_io::{AsyncRead, AsyncWrite};
 
+use std::fmt;
+
 /// In progress H2 connection binding
 pub struct Handshake<T> {
     // TODO: unbox
@@ -108,3 +108,9 @@ impl<T> Future for Handshake<T> {
         self.inner.poll()
     }
 }
+
+impl<T: fmt::Debug> fmt::Debug for Handshake<T> {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        write!(fmt, "Handshake")
+    }
+}