Cant delete profiles

Deleting a Testing Profile

When you’re ready to delete your testing profile, click the image at the top-right of Brave and select the :gear: icon to open up the Manage Profiles view. Hover over the testing profile to reveal a ⋮ in the top-right corner—clicking that will give you the option to remove the testing profile (Note, double-check the metrics to make sure this is the profile you wish to delete).

Source: Create a new profile to help Troubleshoot