chore: remove audio, video, canvas, iframe, and dialog from demo page

Author: Leftium

demo/index.html

@@ -275,24 +275,6 @@ <h4><code>&lt;figure&gt;</code> element with a <code>&lt;picture&gt;</code> elem
           <footer><p><a href="#top">[Top]</a></p></footer>
         </article>
 
-        <article id="embedded__audio">
-          <header><h3>Audio</h3></header>
-          <div><audio controls>audio</audio></div>
-          <footer><p><a href="#top">[Top]</a></p></footer>
-        </article>
-
-        <article id="embedded__video">
-          <header><h3>Video</h3></header>
-          <div><video controls>video</video></div>
-          <footer><p><a href="#top">[Top]</a></p></footer>
-        </article>
-
-        <article id="embedded__canvas">
-          <header><h3>Canvas</h3></header>
-          <div><canvas>canvas</canvas></div>
-          <footer><p><a href="#top">[Top]</a></p></footer>
-        </article>
-
         <article id="embedded__meter">
           <header><h3>Meter</h3></header>
           <div><meter value="2" min="0" max="10">2 out of 10</meter></div>
@@ -311,11 +293,7 @@ <h4><code>&lt;figure&gt;</code> element with a <code>&lt;picture&gt;</code> elem
           <footer><p><a href="#top">[Top]</a></p></footer>
         </article>
 
-        <article id="embedded__iframe">
-          <header><h3>IFrame</h3></header>
-          <div><iframe src="about:blank" height="300" title="Example iframe"></iframe></div>
-          <footer><p><a href="#top">[Top]</a></p></footer>
-        </article>
+
       </section>
 
       <!-- ============================================================ -->
@@ -480,22 +458,7 @@ <h4><code>&lt;figure&gt;</code> element with a <code>&lt;picture&gt;</code> elem
         </form>
       </section>
 
-      <!-- ============================================================ -->
-      <!-- DIALOG (for Phase 3) -->
-      <!-- ============================================================ -->
-      <section id="dialog">
-        <header><h2>Dialog</h2></header>
-        <div>
-          <button type="button" onclick="document.getElementById('test-dialog').showModal()">Open Dialog</button>
-          <dialog id="test-dialog">
-            <h3>Dialog Title</h3>
-            <p>This is a native HTML dialog element.</p>
-            <form method="dialog">
-              <button type="submit">Close</button>
-            </form>
-          </dialog>
-        </div>
-      </section>
+
     </main>
     <footer>
       <p>nimble.css test page. Based on <a href="https://github.com/cbracco/html5-test-page">html5-test-page</a> by <a href="https://twitter.com/cbracco">@cbracco</a>.</p>