apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/repository/InstanceConfigRepository.java/InstanceConfigRepository/batchDelete
class InstanceConfigRepository:  @Modifying
  @Query("delete from InstanceConfig  where ConfigAppId=?1 and ConfigClusterName=?2 and ConfigNamespaceName = ?3")
  int batchDelete(String appId, String clusterName, String namespaceName);