Note
You cannot remove the owner or the guest profile, but you can reset them. If you want to reset the owner profile, you need to do a factory reset. The owner profile also resets when you end your ownership. The guest profile resets when you switch to another profile.
Press the car symbol 
in the bottom bar and go to Settings.
in the bottom bar and go to Settings.Tip
You can also press the profile symbol at the top for quicker access to profile settings.
Go to Profiles.
Select Remove this profile.
The car will switch to the guest profile automatically.
Tip
The owner can remove co-driver profiles in the car by going to Manage other profiles in profile settings. The owner can also remove user profiles from the car via the Volvo Cars app. This only works if a profile is connected to a Volvo ID, otherwise it won't show up in the mobile app.