am 8b9d55e4: docs: Removed extraneous "system components" info

<!--

  <h2>See also</h2>

  <ol>

    <li></li>

    <li>

    </li>

  </ol>

-->

  </div> <!-- qv -->

</div> <!-- qv-wrapper -->

<!-- video box -->

<a class="notice-developers-video"

    href="https://www.youtube.com/watch?v=f17qe9vZ8RM">

<div>

    <h3>Video</h3>

    <p>Google I/O 2015—Android M Permissions: Best Practices for

      Developers</p>

</div>

</a>

<p>

  The M Developer Preview introduces a new app permissions model which

<ul>

  <li>System components automatically receive all

  the permissions listed in their manifests. However, the user can still revoke

  permissions at any time by going to the system's <strong>Settings</strong>

  app and choosing <strong>Apps &gt;</strong> <i>app_name</i> <strong>&gt;

  Permissions</strong>. Because users can revoke these permissions at will,

  the app should continue to check for permissions at run

  time and request them if necessary.

  the permissions listed in their manifests.

  </li>

  <li>If the app requests permissions in the manifest that fall under {@link