move matchMedia polyfill to carousel

components/carousel/index.jsx

@@ -1,3 +1,18 @@
+// matchMedia polyfill for
+// https://github.com/WickyNilliams/enquire.js/issues/82
+if (typeof window !== 'undefined') {
+  const matchMediaPolyfill = function matchMediaPolyfill() {
+    return {
+      matches: false,
+      addListener: function () {
+      },
+      removeListener: function () {
+      }
+    };
+  };
+  window.matchMedia = window.matchMedia || matchMediaPolyfill;
+}
+
 import Carousel from 'react-slick';
 import React from 'react';
 import assign from 'object-assign';

index.js

@@ -2,21 +2,6 @@ import React from 'react';
 
 require('./style/index.less');
 
-// matchMedia polyfill for
-// https://github.com/WickyNilliams/enquire.js/issues/82
-if (typeof window !== 'undefined') {
-  const matchMediaPolyfill = function matchMediaPolyfill() {
-    return {
-      matches: false,
-      addListener: function () {
-      },
-      removeListener: function () {
-      }
-    };
-  };
-  window.matchMedia = window.matchMedia || matchMediaPolyfill;
-}
-
 const antd = {
   Affix: require('./components/affix'),
   Datepicker: require('./components/datepicker'),