fix: countdown remove cloneElement

Author: tangjinzhou

components/locale-provider/LocaleReceiver.jsx

@@ -2,6 +2,7 @@ import PropTypes from '../_util/vue-types';
 import defaultLocaleData from './default';
 
 export default {
+  name: 'LocaleReceiver',
   props: {
     componentName: PropTypes.string.def('global'),
     defaultLocale: PropTypes.oneOfType([PropTypes.object, PropTypes.func]),

components/statistic/Countdown.jsx

@@ -1,6 +1,5 @@
 import * as moment from 'moment';
 import interopDefault from '../_util/interopDefault';
-import { cloneElement } from '../_util/vnode';
 import { initDefaultProps, getListeners } from '../_util/props-util';
 import Statistic, { StatisticProps } from './Statistic';
 import { formatCountdown } from './utils';
@@ -70,13 +69,7 @@ export default {
       return formatCountdown(value, { ...config, format });
     },
 
-    // Countdown do not need display the timestamp
-    valueRenderHtml: node =>
-      cloneElement(node, {
-        props: {
-          title: undefined,
-        },
-      }),
+    valueRenderHtml: node => node,
   },
 
   render() {