To delete a user in Google Workspace, you must be a Google Workspace administrator. Here are the steps to delete a user:

1. Sign in to your Google Workspace admin account at admin.google.com.
2. Click on "Users" from the dashboard.
3. Find the user you want to delete from the list of users.
4. Check the box next to the user's name.
5. Click on the "Delete" button at the top of the page.
6. In the confirmation dialog box, select the checkbox to confirm that you understand that the user's data will be permanently deleted, and click on the "Delete" button.

Note that when you delete a user, their data will be deleted permanently after a grace period of 20 days. If you need to retain a user's data for legal or compliance reasons, you should use Google Vault to preserve their data before deleting the user.