1. First, you need to find the brand.
Start by clicking the "Brands" button, located by the globe on the top left of the dashboard.
2. Click on the brand you want to delete.
Find the brand listed in the Brands Sidebar or search for it in the search box.
3. Click on the "Edit Brand" button.
4. Click the "Delete [Brand X]?" button on the bottom right of the dashboard.
4. You'll see a confirmation screen.
Click the "Delete" button to remove this brand from AE.
This cannot be reversed, so make sure you really want to do this!
That's it. The brand has been deleted!