How can I delete a property permanently

I no longer manage a property as we have decided to rent it long term. How can I delete it permanently just blocking the dates it is not solution. 

Any help is much appreciated, I couldn't find a delete button anywhere. 

Sharon Powney

Search on Help for 'end partnership' for instructions.  This is the partner forum, not the booking.com help team, so we are not able to do this for you