How do I remove my PSN account from another ps4?

From the settings menu, click “User Management”, and then scroll down to “Delete User.” From there, find the user you want to delete. Click the X icon next to their name to remove them from your account and click “Confirm” on that screen.

Go to the PlayStation account management site and log in with your credential. On the left menu, select “Security.” At the bottom of the Security section, click on [Sign out of all my devices] button. You will then be asked if you’re sure about signing out, so agree to sign out by clicking ‘ok.’

Sign out of the PlayStation Account Management site.
Verify your decision by clicking Sign Out of All Devices at the bottom of Security section.

To deactivate the PS4, use the controller to select “Settings” and then choose “Account Management.” From there, select “Activate as Your Primary PS4.” Next, select “Deactivate” and confirm your decision.

Purchases made with this account will be lost in the event that you cancel. We regret to inform you that refunds are not offered for cancellations, and all content will remain inaccessible if your membership is cancelled during a subscription period.