std: Directly call unsafe {un,}setenv in env

Author: workingjubilee

std/src/env.rs

@@ -9,7 +9,6 @@
 //! and those without will return a [`String`].
 
 #![stable(feature = "env", since = "1.0.0")]
-#![allow(unsafe_op_in_unsafe_fn)]
 
 #[cfg(test)]
 mod tests;
@@ -367,11 +366,8 @@ impl Error for VarError {
 #[rustc_deprecated_safe_2024]
 #[stable(feature = "env", since = "1.0.0")]
 pub unsafe fn set_var<K: AsRef<OsStr>, V: AsRef<OsStr>>(key: K, value: V) {
-    _set_var(key.as_ref(), value.as_ref())
-}
-
-unsafe fn _set_var(key: &OsStr, value: &OsStr) {
-    os_imp::setenv(key, value).unwrap_or_else(|e| {
+    let (key, value) = (key.as_ref(), value.as_ref());
+    unsafe { os_imp::setenv(key, value) }.unwrap_or_else(|e| {
         panic!("failed to set environment variable `{key:?}` to `{value:?}`: {e}")
     })
 }
@@ -434,11 +430,8 @@ unsafe fn _set_var(key: &OsStr, value: &OsStr) {
 #[rustc_deprecated_safe_2024]
 #[stable(feature = "env", since = "1.0.0")]
 pub unsafe fn remove_var<K: AsRef<OsStr>>(key: K) {
-    _remove_var(key.as_ref())
-}
-
-unsafe fn _remove_var(key: &OsStr) {
-    os_imp::unsetenv(key)
+    let key = key.as_ref();
+    unsafe { os_imp::unsetenv(key) }
         .unwrap_or_else(|e| panic!("failed to remove environment variable `{key:?}`: {e}"))
 }