Editorial: remove references to UA stylesheet in developer edition

Fixes #11132.

Author: josepharhar

source

@@ -79638,9 +79638,16 @@ END:VCARD</pre>
   is no longer, directly relevant to the page's current state, or that it is being used to declare
   content to be reused by other parts of the page as opposed to being directly accessed by the user.
   User agents should not render elements that are in the <span
-  data-x="attr-hidden-hidden-state">hidden</span> state. This requirement may be implemented
-  indirectly through the style layer. For example, a web browser could implement these requirements
-  <a href="#hiddenCSS">using the rules suggested in the Rendering section</a>.</p>
+  data-x="attr-hidden-hidden-state">hidden</span> state.</p>
+
+  <div w-nodev>
+
+  <p class="note">The requirement for user agents not to render elements that are in the <span
+  data-x="attr-hidden-hidden-state">hidden</span> state can be implemented indirectly through the
+  style layer. For example, a web browser could implement these requirements <a
+  href="#hiddenCSS">using the rules suggested in the Rendering section</a>.</p>
+
+  </div>
 
   <p>When an element has the <code data-x="attr-hidden">hidden</code> attribute in the <span
   data-x="attr-hidden-until-found-state">hidden until found</span> state, it indicates that the
@@ -79653,11 +79660,15 @@ END:VCARD</pre>
   <code data-x="event-beforematch">beforematch</code> is also fired on the element before the <code
   data-x="attr-hidden">hidden</code> attribute is removed.</p>
 
-  <p>Web browsers will use 'content-visibility: hidden' instead of 'display: none' when the <code
-  data-x="attr-hidden">hidden</code> attribute is in the <span
+  <div w-nodev>
+
+  <p class="note">Web browsers will use 'content-visibility: hidden' instead of 'display: none'
+  when the <code data-x="attr-hidden">hidden</code> attribute is in the <span
   data-x="attr-hidden-until-found-state">hidden until found</span> state, as specified in the <a
   href="#hiddenCSS">Rendering section</a>.</p>
 
+  </div>
+
 
   <div class="note">
    <p>Because this attribute is typically implemented using CSS, it's also possible to override it