增强服务配置文件启动功能，支持文件配置仍然可以修改

src/main/java/net/tccn/service/MetadataService.java

@@ -256,11 +256,6 @@ public class MetadataService extends BaseService { //arango
 
     @RestMapping(name = "link_save", comment = "实体关系列表")
     public JBean linkSave(MetaLink link, @RestParam(name = "platToken") String token) {
-        if (link.getKey() != null) {
-            link.find(String.format("UPDATE '%s' WITH { link:null  } IN MetaLink", link.getKey()), Map.class); //避免删除属性无效
-            // fixme: 将逻辑迁移到 MetaKit中:
-        }
-
         MetaKit.save(link);
         return JBean.OK;
     }