To delete the current target district, on the MAP tab, in the Options group, click Redistricter, and Delete District.
The Delete District command deletes the district that is currently designated as the target district. Any objects that belong to the target district are reassigned to the Unassigned district. It is not possible to delete the Unassigned district.
Ending a Redistricting Session
To end a redistricting session, close the Districts Browser window.