Remove all hosts which are not in bb-hosts or it's includes

Hi

How can I automatically remove all history and other data from hosts which 
are not in one or any bb-hosts file any more.

Thanks
Thorsten Erdmann
ITI/EP68
Mercedes Benz Werk Hamburg
Tel.: +XX-XX-XXXX-XXXX
mobil: +XX-XXX-XXXXXXX
Lotus-Fax:+XX-XXX-XXXXXXXXXX
mail: user-9219fb9415b1@xymon.invalid


If you are not the intended addressee, please inform us immediately that you have received this e-mail in error, and delete it. We thank you for your cooperation.