If you wish to do delete a product, Here is an article from Shopify that can help you, https://help.shopify.com/en/manual/products/add-update-products#delete-a-product.
Please note that product deletion would remove it permanently from your entire Shopify storefront.
If you just want to hide specific products on the Wholesale Order Form, here are two articles that can help you with the same,
How do I hide specific products from specific customer groups on the Wholesale Order Form?
How do I show specific products to specific customer groups on the Wholesale Order Form?