You can remove a project or a template project from the Projects list in Site Administration. This does not delete the project from the server and you can restore the project if necessary. For details on restoring access to a project, see Restoring Access to Projects.
Note: If the project is currently in use, it cannot be removed. For information about how to manually remove a project, see this KB article.
In Site Administration, click the Site Projects tab.
In the Projects list, select a project.
Click the Remove Project or Remove Template button
Click OK to confirm. If the project is still active, you are prompted to deactivate it.
For more information, see Deactivating and Activating Projects.