If you have a vendor who is no longer available as a current supplier, you can hide the vendor's name so it no longer appears on the list. This way you won't run the risk of choosing that vendor by mistake. Also, the vendor you hide is no longer included in reports, although if you prepare a report that includes a time period where the vendor was still active, it will show up on the report.
Hide a List Entry
Change the Hidden Status of List Entries