Automatically added sites
If you use your Google Account to create sites using other Google products (for example, Blogger), Webmaster Tools can detect those sites and automatically add them to the Webmaster Tools account that uses the same Google Account.
You can easily delete any automatically added sites you decide you don't want.
- On the Webmaster Tools home page, click Manage this site next to the site(s) you don't want to see in your Webmaster Tools account.
- Click Delete site.