Fix typo

Author: eldruin

embedded-hal/README.md

@@ -76,7 +76,6 @@ for the *embedded-hal* keyword](https://crates.io/keywords/embedded-hal).
 If you are writing a platform agnostic driver yourself you are highly encouraged to [add the
 embedded-hal keyword](https://doc.rust-lang.org/cargo/reference/manifest.html#package-metadata)
 to your crate before publishing it!
-//
 
 ## Serial/UART traits