Fix clippy warnings

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

crates/runc-shim/src/service.rs

@@ -57,15 +57,13 @@ impl Shim for Service {
         _publisher: RemotePublisher,
         _config: &mut Config,
     ) -> Self {
-        let mut service = Service {
+        // TODO: add publisher
+
+        Service {
             exit: Arc::new(ExitSignal::default()),
             id: id.to_string(),
             namespace: namespace.to_string(),
-        };
-
-        // TODO: add publisher
-
-        service
+        }
     }
 
     fn start_shim(&mut self, opts: StartOpts) -> Result<String> {

crates/shim/src/lib.rs

@@ -113,9 +113,11 @@ pub struct StartOpts {
 /// Helper structure that wraps atomic bool to signal shim server when to shutdown the TTRPC server.
 ///
 /// Shim implementations are responsible for calling [`Self::signal`].
+#[allow(clippy::mutex_atomic)] // Condvar expected to be used with Mutex, not AtomicBool.
 #[derive(Default)]
 pub struct ExitSignal(Mutex<bool>, Condvar);
 
+#[allow(clippy::mutex_atomic)]
 impl ExitSignal {
     /// Set exit signal to shutdown shim server.
     pub fn signal(&self) {