[PATCH 3/3] rust: pin-init: examples: use `allow` instead of `expect`

[Benno Lossin <benno.lossin@proton.me>]

Rust 1.78 doesn't emit a `dead_code` error on the annotated element,
resulting in the `unfulfilled_lint_expectations` error. Rust 1.85 does
emit the `dead_code` error, so we still need an `allow`.

Link: https://github.com/Rust-for-Linux/pin-init/pull/33/commits/0e28cbb895bd29f896a59b40e8ed506ea7bef13c
Signed-off-by: Benno Lossin <benno.lossin@proton.me>
---
 rust/pin-init/examples/pthread_mutex.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/pin-init/examples/pthread_mutex.rs b/rust/pin-init/examples/pthread_mutex.rs
index f020dd266506..e28a0bfd4179 100644
--- a/rust/pin-init/examples/pthread_mutex.rs
+++ b/rust/pin-init/examples/pthread_mutex.rs
@@ -42,7 +42,7 @@ fn drop(self: Pin<&mut Self>) {
 
     #[derive(Debug)]
     pub enum Error {
-        #[expect(dead_code)]
+        #[allow(dead_code)]
         IO(std::io::Error),
         Alloc,
     }
-- 
2.48.1