Unable to disconnect Heroku app from GitHub Account
<p>We're using Heroku Pipeline and GitHub integration:</p>

<ol>
<li>Staging app was manually deployed with <code>git push heroku master</code>.</li>
<li>Production app was automatically deployed upon commit to Master on GitHub repo.</li>
</ol>

<p>I want to change this workflow so that:</p>

<ol>
<li>Staging app is automatically deployed upon commit to Master on GitHub repo.</li>
<li>Production app is the result of a Staging app being promoted.</li>
</ol>

<p>Thus, I need to unlink the Production App from the GitHub Account/Repo. The instructions are here:</p>

<p><a href="https://devcenter.heroku.com/articles/github-integration#disconnecting-from-github" rel="noreferrer">GitHub Integration | Heroku Dev Center</a></p>

<p>But, in my case, there's no "Disconnect" button:</p>

<p><a href="https://i.stack.imgur.com/pBX8P.png" rel="noreferrer"><img src="https://i.stack.imgur.com/pBX8P.png" alt="This is the whole width of the screen"></a></p>

<p>How can I disconnect it?</p>