Disabling approved addresses is currently available only on the Gemini mobile app and will be available soon on the web. Please see below for the steps to disabling approved addresses from the Gemini app:

1. Tap on Account settings icon in the top right
2. Scroll down to Security settings (currently available on the Gemini mobile app only)
3. Under Approved Addresses tap "Manage"
4. When Approved Addresses is enabled the toggle will be to the right. If you wish to disable you will need to tap on the toggle then confirm on the next screen with: Yes, disable 

Please note: For account security purposes a seven-day hold will be in affect until it is completely disabled to prevent any unauthorized withdrawals of your crypto. During this seven-day hold you may still withdraw your crypto to your previously approved addresses then after the seven-day hold you can withdraw to any address.