chore: Clippy lints and compile fixes.

src/net/session/outbound_session.rs

@@ -574,8 +574,7 @@ impl PeerDiscovery {
         let wakeup_end = Instant::now();
 
         let epsilon = Duration::from_millis(200);
-        let sleep_was_instant = wakeup_end - wakeup_start <= epsilon;
-        sleep_was_instant
+        wakeup_end - wakeup_start <= epsilon
     }
 
     fn notify(&self) {

src/system/condvar.rs

@@ -72,6 +72,12 @@ impl CondVar {
     }
 }
 
+impl Default for CondVar {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 pub struct CondVarWait<'a> {
     state: &'a Mutex<CondVarState>,
 }

src/system/lazy_weak.rs

@@ -91,3 +91,9 @@ impl<Parent> LazyWeak<Parent> {
         self.0.get().unwrap().upgrade().unwrap()
     }
 }
+
+impl<Parent> Default for LazyWeak<Parent> {
+    fn default() -> Self {
+        Self::new()
+    }
+}