Where can I edit and remove the seller info or better yet, the box and the contents where it belongs? The link of a sample page is ->http://www.hockeycellar.com/product/bauer-supreme-one-2-gloves-junior/
Please open your Dokan plugin folder/includes/wc-template.php and in this file you have find out this function- function dokan_product_seller_tab( $val ). In this function you will get the code for seller info tab. You have to comment out those code to get your needs.