DictionaryHandle :: RemoveExpression - - internal feature
Return value:  Success ( logical  )
Implementation details
logical 
DictionaryHandle  :: RemoveExpression ( NString &clsnames, NString &fnames )
- clsnames
 - Class name
sys_ident of a ODC_ImpClass, used to create a TypeKey in conjunction with nsid 
- fnames - Function or action name

