Remove html_root_url

Author: taiki-e

src/lib.rs

@@ -4,7 +4,6 @@
 #![warn(missing_docs, missing_debug_implementations)]
 #![deny(bare_trait_objects)]
 #![allow(unknown_lints)]
-#![doc(html_root_url = "https://docs.rs/pin-utils/0.1.0")]
 
 #[macro_use]
 mod stack_pin;