appease clippy

src/map.rs

@@ -337,6 +337,7 @@ impl<K, V, S> HashMap<K, V, S> {
     ///
     /// Note that _all_ `Guard` references provided to access the returned map _must_ be
     /// constructed using guards produced by `collector`.
+    #[must_use]
     pub fn with_collector(mut self, collector: Collector) -> Self {
         self.collector = collector;
         self

src/node.rs

@@ -392,7 +392,7 @@ impl<K, V> TreeBin<K, V> {
                     .is_ok()
                 {
                     waiting = true;
-                    let current_thread = Shared::boxed(current(), &collector);
+                    let current_thread = Shared::boxed(current(), collector);
                     let waiter = self.waiter.swap(current_thread, Ordering::SeqCst, guard);
                     assert!(waiter.is_null());
                 }

src/raw/mod.rs

@@ -61,7 +61,7 @@ impl<K, V> Table<K, V> {
     }
 
     pub(crate) fn new(bins: usize, collector: &Collector) -> Self {
-        Self::from(vec![Atomic::null(); bins], &collector)
+        Self::from(vec![Atomic::null(); bins], collector)
     }
 
     pub(crate) fn is_empty(&self) -> bool {