How to delete backlink from die website?

[julia timpi]

The process of removing bad backlinks is relatively simple, if time-consuming:
Understand what makes a backlink 'toxic'
Use a tool to identify all bad links pointing to your website.
Contact the webmaster and request removal.
Create and submit a 'disavow' file to Google to ignore those links.

[Lishmalinyjames]

Identify your bad links (you'll find how exactly from this article).
Search for the contact information of the website you have the link on.
Contact the webmaster asking him to remove the link. ...
Disavow the links and upload the file to Google.

[anilkh7058]

By deleting your website you can delete backlinks.

[anandkjha]

For that, you have 2 options

One is you disavow all backlinks you see in the google search console

The second option is you need to contact every website owner to delete the links. This is impossible so leave it. Start from the new domain.

Have a nice day

[George Peter]

You don't "delete" dead backlinks in GWMT, they're just stale index data. Let Google recrawl. Focus on link profile hygiene: 404s are fine. If toxic domains hit you, use disavow.
Otherwise ignore, keep crawl budget clean, fix internal linking, and monitor via GSC + Ahrefs.