You can remove team members from your Coinbase Prime account anytime using the steps below:
On the left hand side of the page, click Settings
Click Team Members.
Next to the team member you would like to remove , select the (...) Edit Access
Remove from individual portfolios or the entire entity
Click Continue
Click Initiate Changes
Confirm with your YubiKey.
This change will require either Entity or Portfolio policy approvals. You can track the status under Pending Approvals in the Activity tab.