Remove unused code

Author: c-git

src/leetcode_env/list.rs

@@ -42,12 +42,6 @@ impl Debug for ListHead {
     }
 }
 
-impl ListHead {
-    fn new(head: Option<Box<ListNode>>) -> Self {
-        ListHead { head }
-    }
-}
-
 impl From<ListHead> for Option<Box<ListNode>> {
     fn from(value: ListHead) -> Self {
         value.head

src/leetcode_env/tree.rs

@@ -23,9 +23,7 @@ impl TreeNode {
             right: None,
         }
     }
-    fn wrapped_node(val: i32) -> Option<Rc<RefCell<Self>>> {
-        Some(Rc::new(RefCell::new(Self::new(val))))
-    }
+
     fn wrapped_node_maybe(val: Option<i32>) -> Option<Rc<RefCell<Self>>> {
         val.map(|x| Rc::new(RefCell::new(Self::new(x))))
     }