Remove nightly checks.

Async fn in traits has been stable for 7 months, it's very unlikely someone is using such old nightlies.

Fixes #618

Author: Dirbaio

embedded-hal-async/build.rs

@@ -1,12 +1,6 @@
 #![doc = include_str!("../README.md")]
 #![warn(missing_docs)]
 #![no_std]
-// disable warning for already-stabilized features.
-// Needed to pass CI, because we deny warnings.
-// We don't immediately remove them to not immediately break older nightlies.
-// When all features are stable, we'll remove them.
-#![cfg_attr(nightly, allow(stable_features, unknown_lints))]
-#![cfg_attr(nightly, feature(async_fn_in_trait, impl_trait_projections))]
 #![allow(async_fn_in_trait)]
 
 pub mod delay;

embedded-hal-async/src/lib.rs

@@ -2,15 +2,6 @@
 #![warn(missing_docs)]
 #![cfg_attr(not(feature = "std"), no_std)]
 #![cfg_attr(docsrs, feature(doc_cfg))]
-// disable warning for already-stabilized features.
-// Needed to pass CI, because we deny warnings.
-// We don't immediately remove them to not immediately break older nightlies.
-// When all features are stable, we'll remove them.
-#![cfg_attr(all(feature = "async", nightly), allow(stable_features))]
-#![cfg_attr(
-    all(feature = "async", nightly),
-    feature(async_fn_in_trait, impl_trait_projections)
-)]
 
 // needed to prevent defmt macros from breaking, since they emit code that does `defmt::blahblah`.
 #[cfg(feature = "defmt-03")]

embedded-hal-bus/build.rs

@@ -2,18 +2,6 @@
 #![cfg_attr(docsrs, feature(doc_cfg))]
 #![warn(missing_docs)]
 #![doc = include_str!("../README.md")]
-// disable warning for already-stabilized features.
-// Needed to pass CI, because we deny warnings.
-// We don't immediately remove them to not immediately break older nightlies.
-// When all features are stable, we'll remove them.
-#![cfg_attr(
-    all(any(feature = "tokio-1", feature = "futures-03"), nightly),
-    allow(stable_features)
-)]
-#![cfg_attr(
-    all(any(feature = "tokio-1", feature = "futures-03"), nightly),
-    feature(async_fn_in_trait, impl_trait_projections)
-)]
 
 #[cfg(feature = "std")]
 #[cfg_attr(docsrs, doc(cfg(feature = "std")))]

embedded-hal-bus/src/lib.rs

@@ -2,12 +2,6 @@
 #![cfg_attr(docsrs, feature(doc_cfg))]
 #![warn(missing_docs)]
 #![doc = include_str!("../README.md")]
-// disable warning for already-stabilized features.
-// Needed to pass CI, because we deny warnings.
-// We don't immediately remove them to not immediately break older nightlies.
-// When all features are stable, we'll remove them.
-#![cfg_attr(nightly, allow(stable_features, unknown_lints))]
-#![cfg_attr(nightly, feature(async_fn_in_trait, impl_trait_projections))]
 #![allow(async_fn_in_trait)]
 
 #[cfg(feature = "alloc")]