tbldel
(tbldel table_name record)
The tbldel function deletes in a specified table a record specified by the name of the item, but only if the table entry is not referenced in the drawing.
Valid names of table type names are: BLOCK, DIMSTYLE, GROUP, LAYER, LTYPE, STYLE, UCS, and VIEW.
Return Value
If the function succeeds, it returns the name of the deleted record, otherwise nil.
: (tbldel "LAYER" "ABC")
tblpurge