For User Groups that are no longer needed, you can delete them by following these steps:
Step 1: From the menu, select IAM > User Groups, and the system will display the User Groups Management page.
Step 2: Select Action at the end of the User Group you want to delete from the list. Choose Delete.
Note: You cannot delete a user group that currently has users.
Step 3: Confirm the warning information in the popup and click Delete.