First, Sign in with Administrator Privilege to Google analytics Dashboard
Click on the site you want to delete “All Website Data”
Then go for “ADMIN” on top and click

Now Click on Account Settings on LEFT

Next page will show a button “DELETE ACCOUNT”, Click on that

Now, a confirmation page will come up, Click on “DELETE ACCOUNT”

Ok, you are done now, a new page will come up like this one if you had only 1 site in your dashboard
