Prune futures-* dependencies

src/codec/framed_read.rs

@@ -6,7 +6,7 @@ use crate::frame::{
 
 use crate::hpack;
 
-use futures::{ready, Stream};
+use futures_core::Stream;
 
 use bytes::BytesMut;
 

src/codec/framed_write.rs

@@ -4,7 +4,6 @@ use crate::frame::{self, Frame, FrameSize};
 use crate::hpack;
 
 use bytes::{Buf, BufMut, BytesMut};
-use futures::ready;
 use std::pin::Pin;
 use std::task::{Context, Poll};
 use tokio_io::{AsyncRead, AsyncWrite};

src/codec/mod.rs

@@ -9,9 +9,9 @@ use self::framed_write::FramedWrite;
 
 use crate::frame::{self, Data, Frame};
 
-use futures::*;
-
 use bytes::Buf;
+use futures_core::Stream;
+use futures_sink::Sink;
 use std::pin::Pin;
 use std::task::{Context, Poll};
 use tokio_codec::length_delimited;