Edit: Never mind. Apparently nothing works and once you've followed a blog you'll follow it forever and ever. Even if it's been deleted and no longer exists, you'll still follow it apparently into some sort of blogger hell.
So the secret to unfollowing a blog in blogger is to use Internet Explorer. It's really that simple.
One would think it would be just as simple to do it in Firefox but not so much.
One would think it would be easiest in Chrome (what with both services--Chrome and Blogger--being Google-based services) but no, such is not the case.
My love affair with Google is now over. I'm not getting a divorce . . . but I am no longer as blissfully happy as before. In other words, dear Google, the honeymoon is over and you can cook your own damn dinner and fold your own damn laundry.