fix #1926

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigManager.java

@@ -18,8 +18,6 @@ package com.alibaba.cloud.nacos;
 
 import java.util.Objects;
 
-import javax.annotation.PreDestroy;
-
 import com.alibaba.cloud.nacos.diagnostics.analyzer.NacosConnectionFailureException;
 import com.alibaba.nacos.api.NacosFactory;
 import com.alibaba.nacos.api.config.ConfigService;
@@ -75,14 +73,6 @@ public class NacosConfigManager {
 		return service;
 	}
 
-	@PreDestroy
-	public void destroy() throws NacosException {
-		if (service != null) {
-			service.shutDown();
-			service = null;
-		}
-	}
-
 	public NacosConfigProperties getNacosConfigProperties() {
 		return nacosConfigProperties;
 	}