chromium/content/test/data/accessibility/html/table-column-remove.html

<!--
@BLINK-ALLOW:*ColumnCount*
@BLINK-ALLOW:*ColumnIndex*
@WAIT-FOR:done
-->
<style>
  .hide-first-column td:first-child { display: none; }
</style>
<table border="1">  <!-- Border forces data table -->
  <tbody>
    <tr>
      <td>AB</td>
      <td>B</td>
    </tr>
    <tr>
      <td>CD</td>
      <td>D</td>
    </tr>
  </tbody>
</table>

<script>
  setTimeout(() => {
    document.body.className = "hide-first-column";
    document.title="done";
  }, 50);
</script>