The only way to remove an account is to log into it. If you cannot do this, then you should contact the platform to try and recover the account. If the platform is unable to assist you, then you're stuck with it forever. See Bungie's official below quoted and linked below regarding this: [quote]Destiny Player Support and Bungie cannot modify or remove accounts linked to Bungie.net profiles. To protect player privacy and data, you must be able to log in to any linked accounts to prove ownership prior to modifying your linked account. If you no longer have access to a linked account, you will need to reach out to the specific platform’s support for assistance with account recovery options. https://help.bungie.net/hc/en-us/articles/360049498031-Destiny-2-Cross-Save-Guide[/quote]