Baby is widely viewed as a financial dog and hence LH has not been able to sell it.
As I understand the deal with IAG, BA gets a price reduction if baby and regional have not been sold. This price reduction probably equates to the cost of closing these businesses.
This could be passed onto e.g. Jet 2, in the form of negative consideration to take it off their hands and IAG/BA avoids the negative publicity of closing down the business.
I'm sure no airline is interested in buying it for $$, but to get paid to take it off IAG's hands could be a different matter.