chore: silence two pre-existing clippy lints

- macos_privacy.rs: drop the redundant inner #![cfg(target_os
  = "macos")]; lib.rs already gates the mod declaration with
  #[cfg(target_os = "macos")] (clippy::duplicated_attributes).
- macos_status_item.rs: inline status_item into the format
  string (clippy::uninlined_format_args).

No behavior change. Brings `cargo clippy --workspace
--all-targets --all-features -- -D warnings` back to clean.

lan-mouse-gtk/src/macos_privacy.rs

@@ -1,5 +1,3 @@
-#![cfg(target_os = "macos")]
-
 //! Tiny macOS Privacy-pane helpers used by the GUI.
 //!
 //! On macOS 13+, the Accessibility grant transitively confers the