Move impl from default to new

* new has the description, so it should have the code.

src/lockfree/queue.rs

@@ -39,6 +39,13 @@ unsafe impl<T: Send> Send for Queue<T> {}
 
 impl<T> Default for Queue<T> {
     fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl<T> Queue<T> {
+    /// Create a new, empty queue.
+    pub fn new() -> Self {
         let sentinel = Box::into_raw(Box::new(Node {
             data: MaybeUninit::uninit(),
             next: Atomic::null(),
@@ -50,13 +57,6 @@ impl<T> Default for Queue<T> {
             tail: CachePadded::new(sentinel.into()),
         }
     }
-}
-
-impl<T> Queue<T> {
-    /// Create a new, empty queue.
-    pub fn new() -> Self {
-        Self::default()
-    }
 
     /// Adds `t` to the back of the queue.
     pub fn push(&self, t: T, guard: &mut Guard) {

src/lockfree/stack.rs

@@ -24,16 +24,16 @@ unsafe impl<T: Send> Sync for Stack<T> {}
 
 impl<T> Default for Stack<T> {
     fn default() -> Self {
-        Self {
-            head: Atomic::null(),
-        }
+        Self::new()
     }
 }
 
 impl<T> Stack<T> {
     /// Creates a new, empty stack.
     pub fn new() -> Stack<T> {
-        Self::default()
+        Self {
+            head: Atomic::null(),
+        }
     }
 
     /// Pushes a value on top of the stack.