docs: Remove note about inablity to submit apps to Google Play.

setting up your development environment and meeting the the minimum requirements

to enable an app to communicate with Auto.</p>

<p class="note"><strong>Important:</strong> If you are planning to develop

apps for Auto, you are encouraged to begin enabling and testing your

apps now. However, Auto-enabled apps cannot be published at this time.

Join the

<a href="http://g.co/AndroidAutoDev" class="external-link">Auto

Developers Google+ community</a> for updates on when you will be able to submit

your Auto-enabled apps.</p>

<h2 id="dev-project">Set Up an Auto Project</h2>

<p>This section describes how to create a new app or modify an existing app to

communicate with Auto.</p>