The following are completely separate products to EBS:
• Oracle Business Intelligence Suite Enterprise Edition Plus
• Oracle Hyperion Capital Asset Planning
• Oracle Hyperion Planning Plus
• Oracle Hyperion Workforce Planning
• Oracle Informatica Power Center and PowerConnect Adapters
• Oracle Project Analytics
It sounds more like you want to decomission your BI Applications environment.
You would really need to speak with your account manager as licencing is an awfully complex area which varies from customer to customer. It's pretty easy to buy extra licences from Oracle but far less easy to relinquish them unfortunately.