docs: remove legacy locale mixin

src/col/demo/index.vue

@@ -8,15 +8,11 @@
 
     <van-row>
       <van-col span="4">span: 4</van-col>
-      <van-col span="10" offset="4">
-        offset: 4, span: 10
-      </van-col>
+      <van-col span="10" offset="4"> offset: 4, span: 10 </van-col>
     </van-row>
 
     <van-row>
-      <van-col offset="12" span="12">
-        offset: 12, span: 12
-      </van-col>
+      <van-col offset="12" span="12"> offset: 12, span: 12 </van-col>
     </van-row>
   </demo-block>
 
@@ -55,17 +51,24 @@
   </demo-block>
 </template>
 
-<script>
+<script lang="ts">
+import { useTranslate } from '@demo/use-translate';
+
+const i18n = {
+  'zh-CN': {
+    title2: '在列元素之间增加间距',
+    justify: '对齐方式',
+  },
+  'en-US': {
+    title2: 'Column Spacing',
+    justify: 'Justify Content',
+  },
+};
+
 export default {
-  i18n: {
-    'zh-CN': {
-      title2: '在列元素之间增加间距',
-      justify: '对齐方式',
-    },
-    'en-US': {
-      title2: 'Column Spacing',
-      justify: 'Justify Content',
-    },
+  setup() {
+    const t = useTranslate(i18n);
+    return { t };
   },
 };
 </script>