How to delete from the settings screen
1. Click on the Extension icon in Chrome to display Wallet, and then click on the "gear icon" in the upper right corner of Wallet
2. Go to the settings screen and click on "Allow/Disallow connection list" under "Wallet".
3. Click "Banned Websites List" in the right menu
4. A list of the URLs of the sites you have added will be displayed under your account name.
5. Click Remove site from list.
6. A confirmation dialog will appear, click "Remove site from connected list