Editorial: return nothing from "set up a window ESO"

Neither of the two call sites use this return value (although one
stores it and does nothing with it).

Fixes #6146.

Author: domfarolino

source

@@ -77399,8 +77399,7 @@ popup4.close();</code></pre></div>
    otherwise <var>embedder</var>'s <span>relevant settings object</span>'s <span>top-level
    origin</span>.</p></li>
 
-   <li><p>Let <var>settingsObject</var> be the result of <span data-x="set up a window environment
-   settings object">setting up a window environment settings object</span> with <var>realm execution
+   <li><p><span>Set up a window environment settings object</span> with <var>realm execution
    context</var>, null, <var>topLevelCreationURL</var>, and <var>topLevelOrigin</var>.</p></li>
 
    <li><p>Let <var>coop</var> be a new <span>cross-origin opener policy</span>.</p></li>
@@ -79688,8 +79687,6 @@ interface <dfn>BarProp</dfn> {
    <var>topLevelOrigin</var>.</p></li>
 
    <li><p>Set <var>realm</var>'s [[HostDefined]] field to <var>settings object</var>.</p></li>
-
-   <li><p>Return <var>settings object</var>.</p></li>
   </ol>
 
   </div>