Remove doc-comment because the readme then needs the ugly #-prefixed line

Cargo.toml

@@ -18,7 +18,6 @@ libc = "0.2.76"
 log = "0.4.11"
 
 [dev-dependencies]
-doc-comment = "0.3.3"
 easy-parallel = "3.1.0"
 
 [target.'cfg(windows)'.dependencies]

src/lib.rs

@@ -48,9 +48,6 @@
 
 #![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
 
-#[cfg(doctest)]
-doc_comment::doctest!("../README.md");
-
 use std::fmt;
 use std::io;
 use std::sync::atomic::{AtomicBool, Ordering};