Note that this can only be done through a web browser; it is not currently available in the mobile app. Once you're logged in on the web, follow these steps:
- Go to Account Funding.
- Select the coin associated with the address you'd like to remove (e.g., BTC).
- Click Withdrawal.
- Click the wallet address you want to remove, then select Delete this external address.
Once deleted, the address will no longer appear in your saved withdrawal addresses. If you'd like to use it again in the future, you can re-register it at any time.