Published sites, particularly the obsolete ones, can be deleted to prevent further views. When a site gets deleted, all associated links will be removed, as well.
Site deletion is also based on the user role, as describe in this article.
To delete a site, or a template:
From the Sites and Templates dashboard, select the site or template.
Click More from the menu of the Site Details.
Within the Modify Site or Modify Template sections, click Delete button, in red.
Click Delete button again in the dialog box the follows.