Is there a Way to "Delete" (or otherwise remove) Yahoo "Notifications" if one?

If you mean when you get a best answer email, well we can't stop that. It's automatic.

Click Edit My Preferences and under your avatar you will see the notice from Yahoo concerning notifications. If you don;t want to receive notices when a contact asks a question, then click Edit My Preferences, then Privacy and communication. Under Send me a email when: Uncheck the boxes of your choice and anything else on that page you don't want, then click Submit.

I noticed you don't have contacts, so the only email you should be getting from Yahoo is Best answers, and like I said, you can't stop them. Some have marked them Spam. I don't know how that turned out.