It's a sub theme of the current main (mother) theme that you can edit and the edits won't be changed when the mother theme is updated. A davinci child theme would be called davinci-child. Google it.
You have to remove lines like this from the front-page.php file in the davinci theme folder.
<?php get_template_part( 'products/main', 'topselling' ) ?>
But if you have to ask what a child theme is ... I have a feeling you better forget about it or get someone with a bit of experience editing themes to do it for you or start hitting up Google and learn how to do it yourself.
Bottom line .. you can't achieve what you want without editing the PHP code in the theme files.
Just use the Woo version if you want major changes.