Revert "Verify buyable types"

This reverts commit 6060c37cc570a1c5fed9fd1e8a004ba42c7c3c93.
Revert "Views updated to change product to buyable"

This reverts commit 295f1bc5f5397d50baa453774bbed244f20bfc04.
Revert "Beginnings of changing line_item product to buyable"

This reverts commit 0d9873bec07bb1a85c5403fb3b63a1f7a561b41e.
schema