Users with Admin rights, Training Managers or Managers with the Assign Training permission enabled, can unassign curricula from the users under their org structure.
To do so open the main navigation menu and select Curricula under Training.
Open the curriculum in question, hit on the Manage tab, and select Unassign Curriculum.
Now, you need to select the users you wish to be unassigned. You can either select one by one the desired users from the main list or you can select individuals by filtering the users populating to those being associated with the desired org structure set by you.
Select the desired users, click on the Unassign Employees and the unassignment process will start!