article is the default role of an<article> and thus the attribute can be removed.
To test this, copy this snippet into the W3 validator: https://validator.w3.org/nu/#textarea
<!DOCTYPE html>
<html lang="en">
<head>
<title>test</title>
</head>
<body>
<article role="article">
<h1>test</h1>
</article>
</body>
</html>
Also see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/article