Merge pull request #32 from smol-rs/readme

Remove readme field from Cargo.toml

Author: taiki-e

Cargo.toml

@@ -10,7 +10,6 @@ homepage = "https://github.com/smol-rs/async-channel"
 documentation = "https://docs.rs/async-channel"
 keywords = ["mpmc", "mpsc", "spmc", "chan", "futures"]
 categories = ["asynchronous", "concurrency"]
-readme = "README.md"
 
 [dependencies]
 concurrent-queue = "1.2.2"