delete unnecessary ant-ref directive

components/_util/ContainerRender.jsx

@@ -1,8 +1,6 @@
 
 import Vue from 'vue'
 import PropTypes from './vue-types'
-import antRefDirective from './antRefDirective'
-Vue.use(antRefDirective)
 
 export default {
   props: {

components/modal/confirm.js

@@ -1,9 +1,6 @@
 import Vue from 'vue'
 import ConfirmDialog from './ConfirmDialog'
 
-import antRefDirective from '../_util/antRefDirective'
-Vue.use(antRefDirective)
-
 export default function confirm (config) {
   const div = document.createElement('div')
   const el = document.createElement('div')

components/trigger/Trigger.jsx

@@ -10,8 +10,6 @@ import Popup from './Popup'
 import { getAlignFromPlacement, getPopupClassNameFromAlign, noop } from './utils'
 import BaseMixin from '../_util/BaseMixin'
 import { cloneElement } from '../_util/vnode'
-import antRefDirective from '../_util/antRefDirective'
-Vue.use(antRefDirective)
 
 function returnEmptyString () {
   return ''

components/vc-notification/Notification.jsx

@@ -7,9 +7,6 @@ import createChainedFunction from '../_util/createChainedFunction'
 import getTransitionProps from '../_util/getTransitionProps'
 import Notice from './Notice'
 
-import antRefDirective from '../_util/antRefDirective'
-Vue.use(antRefDirective)
-
 let seed = 0
 const now = Date.now()