In case you want to delete Outlook profiles, you can do it through Windows control panel. This might come handy, if in case you need to create a new G Suite synchronization profile and you don't want to mix it up with the old account.
1. Open Windows Control Panel.
2. Open Mail
Easiest way to do this is to use the seacrh utility on the right corner.
3. Choose 'Show Profiles...'
4. Select the account to be deleted and click 'Remove'. Select Yes when you are prompted to confirm the deletion.