How can i delete positions?

 Hey all,

Can you kindly help me to how can i delete some old positions in our system because in the status field there is no delete choice on the list of value at status field in position descrption there is just(active , eliminated, frozen and proposed) and there is no choice delete in the list , that's i need that to hide old positions from assignment screen to be not use it from user , decrees positions in the system and to use the same name again with differant job and organization.

Regards

abdulmohsen