In solitude there is a model called Seller which is found in the api at /generic/seller/ and referenced by a seller_uuid. Now that everything centers around SellerProduct, Seller is no longer necessary. Investigate whether it's possible to remove Seller while still supporting multiple payment providers. Anywhere that referenced seller_uuid in the past will likely need to use public_id to look up the provider specific seller information.

Based on the recently announced future plans for the Marketplace to remove payments, closing these bugs.