Fix all check-cfg errors in the entire repo.

the main ci.sh now passes if running with nightly.

embassy-net-adin1110/Cargo.toml

@@ -29,7 +29,6 @@ critical-section = { version = "1.1.2", features = ["std"] }
 futures-test = "0.3.28"
 
 [features]
-default = [ ]
 defmt = [ "dep:defmt", "embedded-hal-1/defmt-03" ]
 log = ["dep:log"]
 

embassy-net-adin1110/src/lib.rs

@@ -1,6 +1,6 @@
+#![cfg_attr(not(test), no_std)]
 #![deny(clippy::pedantic)]
 #![allow(async_fn_in_trait)]
-#![cfg_attr(not(any(test, feature = "std")), no_std)]
 #![allow(clippy::module_name_repetitions)]
 #![allow(clippy::missing_errors_doc)]
 #![allow(clippy::missing_panics_doc)]