Answer
To remove your Yahoo Account, you must rely on their inactive period. If no one accesses your account for 12 months, it will be deleted. So if you don’t expect anyone to try to log in, there’s nothing else you can do and the account will get deleted after a year of inactivity.
How to recover permanently deleted yahoo mail from trash !
How to Recover Deleted Yahoo! Email Account
To remove your Yahoo Account, you must rely on their inactive period. If no one accesses your account for 12 months, it will be deleted. So if you don’t expect anyone to try to log in, there’s nothing else you can do and the account will get deleted after a year of inactivity.
If you deactivate your Yahoo account, you may restore it at any time.When you delete your Yahoo account, you lose access to all of your data and content, such as email accounts, email folders, Flickr photos, calendars, Yahoo Fantasy teams, and Yahoo Finance portfolios.
You will be able to access your Yahoo mail account and all of its features. The only difference is that you will no longer be able to send or receive emails from Yahoo Groups if you are a member.