合并所有优化

src/util/MyNode.java

@@ -54,9 +54,7 @@ public class MyNode<E> {
         other.setOwner(this.getOwner());
     }
 
-    public MyNode<E> getPrev() {
-        return prev;
-    }
+
 
     public void removeMe() {
         getOwner().remove(this);