remove unused code from examples

Author: yoshuawuyts

README.md

@@ -67,9 +67,7 @@ assert_eq!((a, b, c).join().await, (1, "hello", 3));
 
 ```rust
 use futures_concurrency::prelude::*;
-use futures_lite::stream;
 
-# futures::executor::block_on(async {
 let v: Vec<_> = vec!["chashu", "nori"]
     .into_co_stream()
     .map(|msg| async move { format!("hello {msg}") })

src/lib.rs

@@ -26,7 +26,6 @@
 //!
 //! ```rust
 //! use futures_concurrency::prelude::*;
-//! use futures_lite::stream;
 //!
 //! # futures::executor::block_on(async {
 //! let v: Vec<_> = vec!["chashu", "nori"]