modify.Signed-off-by: <zhouke35@huawei.com>.

Signed-off-by: Nzhouke <zhouke35@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-uitest.md

@@ -2940,7 +2940,7 @@ async function demo() {
 
 UI事件监听器。
 
-### once('toastShow')<sup>10+</sup>
+### once('toastShow')
 
 once(type: 'toastShow', callback: Callback\<UIElementInfo>):void;
 
@@ -2969,7 +2969,7 @@ async function demo() {
 }
 ```
 
-### once('dialogShow')<sup>10+</sup>
+### once('dialogShow')
 
 once(type: 'dialogShow', callback: Callback\<UIElementInfo>): void;