diff --git a/source b/source
index 877761a9424..43502ff896d 100644
--- a/source
+++ b/source
@@ -56850,27 +56850,6 @@ interface <dfn interface>HTMLOptGroupElement</dfn> : <span>HTMLElement</span> {
   attribute must be specified if the <code>optgroup</code> has no child <code>legend</code>
   element.</p>
 
-  <div algorithm>
-  <p>The <code>optgroup</code> <span data-x="html element removing steps">HTML element removing
-  steps</span>, given <var>removedNode</var> and <var>oldParent</var>, are:</p>
-
-  <ol>
-   <li><p>If <var>oldParent</var> is a <code>select</code> element and <var>removedNode</var> has an
-   <code>option</code> child, then run <var>oldParent</var>'s <span>selectedness setting
-   algorithm</span>.</p></li>
-  </ol>
-  </div>
-
-  <div algorithm>
-  <p>The <code>optgroup</code> <span>HTML element moving steps</span>, given <var>movedNode</var>
-  and <var>oldParent</var>, are:</p>
-
-  <ol>
-   <li><p>Run the <code>optgroup</code> <span>HTML element removing steps</span> given
-   <var>movedNode</var> and <var>oldParent</var>.</p></li>
-  </ol>
-  </div>
-
   <div algorithm>
   <p>To <dfn data-x="concept-optgroup-label">get an <code>optgroup</code> element's label</dfn>,
   given an <code>optgroup</code> <var>optgroup</var>:</p>