SmartPost: Unpost a job from a specific site
Use these steps to remove a specific instance of sourcing from a job.
On the Manage Jobs page, locate the job, then click on the “Yes” link in the Launched column:
This opens the Source Summary page. Locate the job board you want to remove the sourcing from and click on the “Unpost e-media” link. This will remove that specific instance of sourcing: