remove extra table cell in emphasis mark table

Author: fantasai

css3-text/Overview.src.html

@@ -2645,7 +2645,6 @@ <h3 id="text-emphasis"><span class="secno">8.2</span>
           <tr>
             <td scope="row">Chinese (Traditional)</td>
             <td>before</td>
-            <td></td>
           </tr>
           <tr>
             <td scope="row">Chinese (Simplified)</td>