Remove cross-origin check from autofocus insertion steps

Step 6 is not needed anymore after the addition of "allow focus steps" in step 5 that checks if the element belongs to an element that allows the feature policy focus-without-user-activation. I.e., if an element is in a frame that allows the policy with *, then it should allow autofocus even if it's from a different origin.

Fixes  whatwg#11276.

Author: ffiori

source

@@ -82402,12 +82402,6 @@ dictionary <dfn dictionary>CommandEventInit</dfn> : <span>EventInit</span> {
    <li><p>If the <span>allow focus steps</span> given <var>target</var> return false, then
    return.</p></li>
 
-   <li><p><span data-x="list iterate">For each</span> <var>ancestorNavigable</var> of
-   <var>target</var>'s <span>ancestor navigables</span>: if <var>ancestorNavigable</var>'s <span
-   data-x="nav-document">active document</span>'s <span
-   data-x="concept-document-origin">origin</span> is not <span>same origin</span> with
-   <var>target</var>'s <span data-x="concept-document-origin">origin</span>, then return.</p></li>
-
    <li><p>Let <var>topDocument</var> be <var>target</var>'s <span>node navigable</span>'s <span
    data-x="nav-top">top-level traversable</span>'s <span data-x="nav-document">active
    document</span>.</p></li>