Doc: remove unused script in site

docs/examples-docs/toast.md

@@ -7,7 +7,7 @@
 </style>
 
 <script>
-import { Toast } from 'packages/index';
+import { Toast } from 'packages';
 
 export default {
   methods: {
@@ -83,9 +83,10 @@ import { Toast } from 'vant';
 <van-button @click="showFailToast">失败</van-button>
 <van-button @click="showForbidClickToast">背景不能点击</van-button>
 <van-button @click="showCustomizedToast(5000)">倒数5秒</van-button>
+```
 
-<script>
-import { Toast } from 'packages/index';
+```javascript
+import { Toast } from 'packages';
 
 export default {
   methods: {
@@ -125,7 +126,6 @@ export default {
     }
   }
 };
-</script>
 ```
 :::
 
@@ -135,9 +135,10 @@ export default {
 ```html
 <van-button @click="showToast">打开</van-button>
 <van-button @click="closeToast">关闭</van-button>
+```
 
-<script>
-import { Toast } from 'packages/index';
+```javascript
+import { Toast } from 'packages';
 
 export default {
   methods: {
@@ -149,7 +150,6 @@ export default {
     }
   }
 };
-</script>
 ```
 :::
 
@@ -159,9 +159,10 @@ export default {
 :::demo 手动关闭
 ```html
 <van-button @click="showHtmlToast">打开</van-button>
+```
 
-<script>
-import { Toast } from 'packages/index';
+```javascript
+import { Toast } from 'packages';
 
 export default {
   methods: {
@@ -173,7 +174,6 @@ export default {
     }
   }
 };
-</script>
 ```
 :::