refactoring

redisson/src/main/java/org/redisson/cache/FastRemovalQueue.java

@@ -61,7 +61,7 @@ public final class FastRemovalQueue<E> {
         private Node<E> next;
         private boolean deleted;
 
-        public Node(E value) {
+        Node(E value) {
             this.value = value;
         }
 
@@ -79,7 +79,7 @@ public final class FastRemovalQueue<E> {
         private Node<E> head;
         private Node<E> tail;
 
-        public DoublyLinkedList() {
+        DoublyLinkedList() {
         }
 
         public void clear() {

redisson/src/main/java/org/redisson/cache/LRUCacheMap.java

@@ -15,9 +15,8 @@
  */
 package org.redisson.cache;
 
-import java.util.*;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.concurrent.atomic.AtomicLong;
 
 /**