WordPress pages vs. non-WordPress pages…..

I have an existing site that I integrated WordPress into. There are about 1,000 pages on the site (and growing) that are static and don’t require WordPress, but I do have the sidebar on. I have the following code at the top:

<?php require('../../blog/wp-blog-header.php'); ?>

If I remove that line and the WordPress sidebar, would those pages take less of a load on the server. The site has about 350,000 page views this month, and my web host is trying to force me to upgrade to Virtual or Dedicated.

P.S. I use WP Super Cache.