活动：删除多余代码

shared/domain/activityField/firstGiftField.ts

@@ -1,3 +1,4 @@
+import moment = require('moment');
 import { FIRST_GIFT_STATE } from '../../consts';
 import { ActivityModelType } from '../../db/Activity';
 import { ActivityFirstGiftModelType } from '../../db/ActivityFirstGift';
@@ -57,7 +58,7 @@ export class FirstGiftData extends ActivityBase {
         if (!data) {
             return;
         }
-        this.todayIndex = deltaDays(data.createdAt, new Date) + 1;
+        this.todayIndex = deltaDays(moment(data.createdAt).startOf('d').toDate(), new Date) + 1;
         this.state = FIRST_GIFT_STATE.OPEN
 
         let daysNum = data.days ? data.days : [];