Delete SFI risk topic

[Rick-Anderson]

• PR to fix
• USER STORY 354312
• https://learn.microsoft.com/en-us/previous-versions/eb0zx8fc(v=vs.140)
• content here

Many duplicates have been fixed so just delete this one.

[Rick-Anderson]

Fixed in https://docs-archive.visualstudio.com/docs-archive-project/_git/previous-versions-root/pullrequest/10913