I saw that a lot of people on the internet ask a question about deleting a project in www.VisualStudio.com site. So I decided to tell you a visual and easy way for solving this problem.
Go to www.VisualStudio.com and login. Then click on your username (in right and top of page). Then click on one of your accounts. In this tutorial, I selected my IranianExperts account.
After logging, click on the Control Panel icon at the top right of a page.
In the control panel page and in the control panel tab, click on a link with this text: "View the collection administration page"
DefaultCollection page, decide to delete a project and then move your mouse on the left site of project name until a black triangle appears. Then, click on the black triangle and you will see a menu and then click on Delete option.
After clicking on Delete option, you will see a dialog box for confirming. Click on checkbox (I understand...) and then click on Delete Project button.
You project will be deleted permanently.