开服：新增版号服

shared/db/GroupMail.ts

@@ -1,9 +1,9 @@
 import BaseModel from './BaseModel';
-import { index, getModelForClass, mongoose, prop, DocumentType } from '@typegoose/typegoose';
+import { index, getModelForClass, prop, DocumentType } from '@typegoose/typegoose';
 import { nowSeconds } from '../pubUtils/timeUtil';
 import { MAIL_STATUS, MAIL_TYPE } from '../consts/constModules/mailConst';
 import { findWhere } from 'underscore';
-const { ObjectId } = mongoose.Types;
+
 class RewardInter {
     @prop({ required: true })
     id: number;