Step 1: To start, make sure you're signed in. Click “Sign In” at the top right.

Step 2: Navigate to the Retailer Benchmarking page, and click 'Settings'

Step 3: Find the property you wish to unlink, and click 'Remove'

Step 4: If you do not have access to your Power Retail Switched On account, or as an additional measure, you can navigate to and remove Google Analytics access for Switched On as below: