Remove 'Powered by WordPress' from Academica theme

I need help removing the ‘Powered by WordPress / Academica WordPress Theme by WPZOOM’ message from the bottom of the Academica WordPress theme on my WordPress.org installation. The only problem is that Academica is not like most WordPress themes in how it displays this message; the code to display the message is actually in its functions.php and not in styles.css or anything similar. If I’m not mistaken, that means I can’t use a child theme to correct this, right? How can I remove this message?