Delete meaningless blank lines

hippo4j-spring-boot/hippo4j-config-spring-boot-starter/src/main/java/cn/hippo4j/core/springboot/starter/refresher/NacosRefresherHandler.java

@@ -57,6 +57,5 @@ public class NacosRefresherHandler extends AbstractCoreThreadPoolDynamicRefresh
                     }
                 });
         log.info("Dynamic thread pool refresher, add nacos listener success. data-id: {}, group: {}", nacosConfig.get("data-id"), nacosConfig.get("group"));
-
     }
 }