To remove the sold by on your site that runs WC Vendors Pro you will need to add the following code to your themes functions.php.
remove_action( 'woocommerce_after_shop_loop_item', array( $wcvendors_pro->wcvendors_pro_store_controller, 'loop_sold_by'), 8 ); remove_action( 'woocommerce_product_meta_start', array( $wcvendors_pro->wcvendors_pro_store_controller, 'product_sold_by'), 8); remove_filter( 'woocommerce_get_item_data', array( $wcvendors_pro->wcvendors_pro_store_controller, 'cart_sold_by' ), 8, 2 );