all: use expect attribute where possible

src/io_uring/ops/poll.rs

@@ -32,7 +32,7 @@ impl IoUring {
         self.poll(fd, c::POLLIN).await.merge()
     }
 
-    #[allow(dead_code)]
+    #[expect(dead_code)]
     pub async fn writable(&self, fd: &Rc<OwnedFd>) -> Result<c::c_short, IoUringError> {
         self.poll(fd, c::POLLOUT).await.merge()
     }

src/io_uring/ops/timeout.rs

@@ -7,7 +7,6 @@ use {
     uapi::c,
 };
 
-#[allow(non_camel_case_types)]
 #[repr(C)]
 #[derive(Default)]
 pub(super) struct timespec64 {