diff --git a/source b/source
index e417e1929e2..031351cd938 100644
--- a/source
+++ b/source
@@ -61259,17 +61259,11 @@ interface <dfn interface>HTMLDialogElement</dfn> : <span>HTMLElement</span> {
   <var>subject</var> and a string or null <var>result</var>:</p>
 
   <ol>
-   <li>
-    <p>If <var>ignoreOpenAttribute</var> is false:</p>
-
-    <ol>
-     <li><p>If <var>subject</var> does not have an <code data-x="attr-dialog-open">open</code>
-     attribute, then return.</p></li>
+   <li><p>If <var>subject</var> does not have an <code data-x="attr-dialog-open">open</code>
+   attribute, then return.</p></li>
 
-     <li><p>Remove <var>subject</var>'s <code data-x="attr-dialog-open">open</code>
-     attribute.</p></li>
-    </ol>
-   </li>
+   <li><p>Remove <var>subject</var>'s <code data-x="attr-dialog-open">open</code>
+   attribute.</p></li>
 
    <li><p>Run <span>close the dialog</span> given <var>subject</var> and <var>result</var>.</p></li>
   </ol>