don't need i18n for date

date-i18n.md

I'd say we don't need to develop i18n for date.

Why?

Because the HTML date-input doesn't do i18n, everybody don't think any problem.

And if we develop i18n for date on some page with date-input, it is confused by two format for date.

---

个人觉得日期日期国际化没有任何意义，特别是在编辑页面。

html input 默认的日期 input 就没有做国际化，大家也正常使用，所以没有必要做日期的国际化。