Deleting a document type in SharePoint
Use this procedure to delete a document type in SharePoint.
- Open the SharePoint client.
 - Open the document library (document type).
 - Select all documents.
 - Click Delete Document.
 - Click Library > Library Settings.
 - Click Delete this Document Library under Permissions and Management.
 - Click Site Actions > Site Settings.
 - Click List Templates in the Galleries column.
 - Select the document library template (document type).
 - Click Delete Document.