I have searched for this a hundred times and only found how to add such tags in Blogger. I have not found a tutorial on how to remove those tags if they are added automatically by Blogger / Blogspot.
In my head area of one of my Blogspot blogs using a custom domain, the tag is added automatically as:
<link href='MY_GOOGLE_PLUS_URL' rel='publisher'/>
I try to remove it, but I cannot find the code anywhere in the template. I used the same template code (copy/pasted xml) in some other blog created by the same Google account. The code does not show there.
I have one more custom domain hosted at Blogger but it does not show the publisher tag automatically.
What am I missing?
After a day of messing around I'm answering my own question.
Turns out if we create a blogger blog (with a custom domain in my case) and add that blogger blog to the list of contributed blog in our Google Plus, rel=publisher of that Google Plus id is automatically added. Once I removed the link from my Google Plus, the code in the header:
<link href='MY_GOOGLE_PLUS_URL' rel='publisher'/>
Dissappears !!