Divi annoyingly adds a post type to their theme called "Projects".
Add this PHP code snippet to your child theme to remove that from the Wordpress admin.
####################
# Remove the Projects Post Type in Divi
# See: https://www.jucra.com/whmcs/knowledgebase/125/
####################
add_filter( 'et_project_posttype_args', 'mytheme_et_project_posttype_args', 10, 1 );
function mytheme_et_project_posttype_args( $args ) {
return array_merge( $args, array(
'public' => false,
'exclude_from_search' => false,
'publicly_queryable' => false,
'show_in_nav_menus' => false,
'show_ui' => false
));
}