You can remove it by editing home.php in wp-content/themes/davinci/home.php
Comment out the php includes line that looks like this"
<!-- BEST DEALS -->
<div class="content-from-cat">
<div class="container">
<h3 class="text-uppercase"><?php _e( 'Best Deals', 'ami3' ); ?></h3>
<?php get_template_part( 'products/main', 'bestdials' ) ?>
</div>
</div>
to look like this:
<!-- BEST DEALS -->
<!-- <div class="content-from-cat">
<div class="container">
<h3 class="text-uppercase"><?php _e( 'Best Deals', 'ami3' ); ?></h3>
<?php get_template_part( 'products/main', 'bestdials' ) ?>
</div>
</div> -->
This way if you ever want to put it back, you can just remove the "<!--" and "-->"
The templates and php files in this theme are pretty easy to work with.
If you have any other design/code issues, just let me know.