Logo should not be a heading

[LJWatson]

On mockup1 the logo is marked up as an <h1>:

<h1 class="logo">
  <a tabindex="2" accesskey="1" href="http://www.w3.org/">
    <img src="https://www.w3.org/2008/site/images/logo-w3c-mobile-lg" alt="W3C" height="53" width="90">
  </a> 
  <span class="alt-logo">W3C</span>
</h1>

The logo should not be a heading because it does not preface a section of content. It also creates an additional step for screen reader users navigating the content by heading.

The "All standards and drafts" <h1> element at the start of the main content area should be the only <h1> on the page.

[tripu]

(Original description edited slightly to correct Markdown formatting.)