Remove html root url as it is not necessary anymore

Author: eldruin

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sysfs_gpio"
-version = "0.6.0" # remember to update html_root_url
+version = "0.6.0"
 authors = [
     "Paul Osborne <[email protected]>",
     "The Embedded Linux Team <[email protected]>",

src/lib.rs

@@ -41,7 +41,6 @@
 //! ```
 
 #![cfg_attr(feature = "async-tokio", allow(deprecated))]
-#![doc(html_root_url = "https://docs.rs/sysfs-gpio/0.6.0")]
 
 #[cfg(feature = "async-tokio")]
 extern crate futures;