Nonprofit with no inventory, employees, or "owners" equity - deactivating system accounts?

Nonprofit with no inventory, employees, or "owners" equity - deactivating system accounts?

I am the accountant for a nonprofit that has no inventory, employees, or owners.  Yet we cannot deactivate employee related system accounts, or the stock and other inventory transaction accounts, nor the portion of the Equity accounts which are attributable to "owners". 

Is there a reason why we cannot simply deactivate these accounts? Does this feature exist on some plan? Thanks.