Welcome to the Community, BusAdmin.
To verify my understanding, are you trying to remove a newly salaried employee from your books? The process mentioned in Rubielyn_J's post will only prevent timesheets from flowing into Payroll, but won't remove them from QuickBooks Time.
If this is the case, you can remove their access from your My Team window. This prevents the employee from tracking time and prevents you from being billed for them.
Here's how:
In the event I've misunderstood the situation, please feel welcome to post a reply here. The Community's always here to help. Have an awesome Tuesday!