Hey there! Can you confirm if you want to delete your Forum profile, or your community profile?
For the Forum profile, I can delete it manually, please let me know.
And, for the community profile, please follow these steps:

1. Click on your name, on the top-left corner of the page
2. Select “Settings”
3. Go to the “Community” tab at the top of the pop-up page
4. Select “Delete public profile”