Unfortunately, at this time we are unable to disassociate your World of Warcraft subscriptions from your Battle.Net account. There is an option, however. If you are looking to keep all of your accounts under one battle.net account, we can transfer the unwanted accounts to another battle.net account created with the same information to free up space. The new battl.net needs to have the same information for us to be able to do this, as we cannot let these accounts be disassociated from you, their creator.
If this is an option you would like to consider, please call Account and Technical Services to perform this for you. Currently, ATS is not allowed to modify or reveal account information over email.
Connect With Us