Sometimes you get a crazy idea and it becomes an utter desire to start writing a blog about it. If it happens quite often with you (it happens a lot with me !), you end up with so many blogs in your dashboard and you realize that you have lost your interest in most of them.Thus, its time to delete the unused blogs and clean up your dashboard.
Here is how to do it.
1.First of all, go to list of blogs in your WordPress Dashboard
2.Click on Blog Admin link below the name of blog that you want to delete.This takes you to mentioned blog’s dashboard.
3.Find the Tools section
4.Click on Delete Blog

5.Follow The instructions (choose the one you desire from dropdown list)
6.Confirm the email which you get at your registered mail address.
7.Your blog is Deleted.

Hello, may I ask how to remove my weblogs? I don’t have time to take care of it.
I can delete it for you, but all unused blogs are auto deleted after 1 month of inactivity. Its your call.