Removes RhinoScript user data items from the current document.
Rhino.DeleteDocumentData ([strSection [, strEntry]])
| strSection | Optional. String. The section name. If omitted, all sections and their corresponding entries are removed. | 
| strEntry | Optional. String. The entry name. If omitted, all entries for strSection are removed. | 
| Boolean | True or False indicating success or failure. | 
| Null | On error. | 
Rhino.DeleteDocumentData "MySection1", "MyEntry1"
Rhino.DeleteDocumentData "MySection1", "MyEntry2"
Rhino.DeleteDocumentData "MySection2", "MyEntry1"