Don't deny(warnings) outside of CI (#2424)

This allows the tests to continue compiling in new Rust versions, even
if new warnings are added.

Fixes #2423.

Author: tbu-

.github/workflows/ci.yml

@@ -14,6 +14,7 @@ permissions:
 
 env: 
   MSRV: 1.69.0
+  RUSTFLAGS: -Dwarnings
 
 jobs:
   macos:

src/lib.rs

@@ -43,7 +43,6 @@
 #![crate_name = "nix"]
 #![cfg(unix)]
 #![allow(non_camel_case_types)]
-#![cfg_attr(test, deny(warnings))]
 #![recursion_limit = "500"]
 #![deny(unused)]
 #![allow(unused_macros)]