refactor: 删除无用代码.

dynamic-threadpool-spring-boot-starter/src/main/java/io/dynamic/threadpool/starter/core/CacheData.java

@@ -3,7 +3,6 @@ package io.dynamic.threadpool.starter.core;
 import io.dynamic.threadpool.common.toolkit.ContentUtil;
 import io.dynamic.threadpool.common.toolkit.Md5Util;
 import io.dynamic.threadpool.common.constant.Constants;
-import io.dynamic.threadpool.starter.listener.Listener;
 import io.dynamic.threadpool.starter.wrap.ManagerListenerWrap;
 import lombok.extern.slf4j.Slf4j;