<header class="header">
  <nav role="navigation" aria-label="main">
    <ul class="header-nav container">
      <li class="header-logo">
        <a href="http://emberjs.com/"><span class="visually-hidden">Ember homepage</span></a>
      <%= link_to_page "About", "/about" %>
      <%= link_to_page "Guides", "http://guides.emberjs.com" %>
      <%= link_to_page "API", "/api" %>
      <%= link_to_page "Community", "/community" %>
      <%= link_to_page "Blog", "/blog" %>
      <%= link_to_page "Builds", "/builds" %>
      <li class="header-search">
        <form>
          <input type="text" id="search-input" class="search-input" placeholder="Search ..."/>
        </form>
      </li>
    </ul>
  </nav>
</header>

<header class="header">
  <nav role="navigation" aria-label="main">
    <ul class="header-nav container">
      <li class="header-logo">
        <a href="http://emberjs.com/"><span class="visually-hidden">Ember homepage</span></a>
      <%= link_to_page "Guides", "http://guides.emberjs.com" %>
      <%= link_to_page "API", "/api" %>
      <%= link_to_page "Community", "/community" %>
      <%= link_to_page "Blog", "/blog" %>
      <%= link_to_page "Builds", "/builds" %>
      <li class="header-search">
        <form>
          <input type="text" id="search-input" class="search-input" placeholder="Search ..."/>
        </form>
      </li>
    </ul>
  </nav>
</header>

Remove About from main navigation
Remove About from main navigation
