How do I Remove/Delete a rig from a shot

Imported Rigs

To delete an Imported rig from your shot, go to the Outliner (Window > Outliner), select the rig you wish to remove from your shot, and hit the "Delete" key to delete it.

Referenced Rigs

To remove a Referenced rig from your shot, go to the Reference Editor (File > Reference Editor), and either uncheck the rig to remove it without deleting the reference completely, or right-click on the reference and go to Reference > Remove Reference to delete it.