To delete a search environment that is attached to a project:
On the Projects tab, go to Projects > Your Project > environments.
Click the remove () icon for the environment you want to delete.
In the dialog box, select Delete Environment.
Click OK.
Note that you cannot delete an environment that is currently designated as primary; you must first make a different environment primary, then delete the first environment.
To delete an unattached search environment:
On the Projects tab, go to Environments.
Click the remove () icon for the environment you want to delete.
Click OK.
Note: Information relating to deleted environments may still appear in search reports; however, the only identifying information for a deleted environment is the repository ID.