Unregister a custom post type

functions.php

/**
 * Unregister a custom post type in WordPress.
 */
function remove_custom_post_type() {
    // Check if the post type exists before attempting to unregister it
    $post_type = 'your_custom_post_type'; // Replace with the slug of the custom post type you want to remove
    if (post_type_exists($post_type)) {
        unregister_post_type($post_type);
    }
}
add_action('init', 'remove_custom_post_type', 20);