bingAI: revert back bing.js change

en/searchurl/bingAI/bing.html

@@ -38,7 +38,6 @@
           <option>魔法聊天(较慢)(用魔法创建聊天后继续使用魔法聊天)</option>
         </select>
       </div>
-        <div id="body-top"></div>
         <div style="text-align: center;">
             <h3>chat with bing</h3>
         </div>

en/searchurl/bingAI/css/bing.css

@@ -211,11 +211,6 @@ body {
     overflow-x: hidden;
 }
 
-#body-top {
-    height: 20vh;
-    width: 100%;
-}
-
 #body-bottom {
     height: 15rem;
     width: 100%;
@@ -517,14 +512,6 @@ div.markdown-body {
 /*手机 css*/
 
 @media screen and (orientation:portrait) and (max-device-width:800px) and (max-device-height:1000px) {
-    :root {
-        font-size: 1rem;
-    }
-
-    div.markdown-body {
-        font-size: 1rem;
-    }
-
     .InternalSearchQuery,
     .InternalLoaderMessage {
         width: 90%;