To clean this up you will need remove the users from Cloud Access Manager which will also remove the license used in CAM.
1. Log in to the Administration Console using the desktop shortcut Cloud Access Manager Application Portal, then click the Users link in the left hand navigation menu.
2. Click Delete Users.
3. Use the search parameters to select the users you want to delete, then click Search.
4. Select the user(s) that you want to delete, then click Delete Users.
The steps provided will remove them from the license count and will delete any of their saved credentials, however it will not prevent them from logging in again.