How to remove Chrome OS primary account
When I was trying out this Chromium OS I could not find any quick way to change the primary account.
So instead I looked for a way how you can do a factory reset and turns out it is very easy.
Keep in mind that all accounts and local data will be erased, so be sure to make a backup on USB or save files on the cloud.
1. While on the login menu press Shift, Ctrl, Alt and R buttons at the same time and select Restart.
2. After done restarting select "Powerwash", confirm it and wait.
3. Now after second restart you can login to your Google account, remember that the first account you log on will be the primary.