remove fusion builder shortcodes

kill-fusion.php

<?php
add_filter('the_content', 'remove_fusion_shortcodes', 20, 1);
function remove_fusion_shortcodes( $content ) {
$content = preg_replace('/\[\/?fusion.*?\]/', '', $content);
return $content;
}
?>

**Tested with WP All Import and Export**

Please can you help me to understand how can i use this code? I want to move from a very old version of AVADA to Divi, and I want to remove all the [fusion_builder... ] shortcodes. It looks like this tiny snippet can do the job, but I really don't know how to use it.

Thanks! Regards

Hello lucagiai,
It's not the best place to look for this kind of help, you should go to a forum rather than on GitHub.
But if you want to use this code, you should copy the code between the tags and past it inside your child theme's function.php file.
Have fun
Thomas