You've recently removed the CloudSOC integration from WSS, and aren't sure how to remove the Data Source from the CloudSOC web UI (Cloudsoc Console > Audit > Device Logs).
CloudSOC Web UI
Audit Data Source
CloudSOC does not allow customers to remove the WSS Data Source from the web UI (Data Source Name: Bluecoat Cloud Proxy).
Create a support case to request help from a support engineer to perform this action.
Support will need to unlink WSS from a back-end tool in order for the Data Source to be removed.