io: move into `tokio` crate (#1691)

A step towards collapsing Tokio sub crates into a single `tokio`
crate (#1318).

The `io` implementation is now provided by the main `tokio` crate.
Functionality can be opted out of by using the various net related
feature flags.

1 files changed, 2 insertions, 3 deletions

diff --git a/tokio/src/net/tcp/split.rs b/tokio/src/net/tcp/split.rs
index db937267..07c7c3ff 100644
--- a/tokio/src/net/tcp/split.rs
+++ b/tokio/src/net/tcp/split.rs
@@ -8,9 +8,8 @@
 //! split has no associated overhead and enforces all invariants at the type
 //! level.
 
-use super::TcpStream;
-
-use tokio_io::{AsyncRead, AsyncWrite};
+use crate::io::{AsyncRead, AsyncWrite};
+use crate::net::TcpStream;
 
 use bytes::{Buf, BufMut};
 use std::io;