This video shows how to deactivate and hide Import Mappings that were created by the Batch Import Tool for record-keeping purposes.

The Mapping File used for each Submission can also downloaded from System>Manage (Batch Import)>Download Mapping File. The Mapping File does not need to be activated to do this.

(The video mentions using System>Configuration Packs>Transfer Mapping>Download - Import XML Mapping, which is a less-direct way to do it.)