{
{   The purpose of this request is to delete a variable.  Any associated table
{ or form object definitions are not updated.
{
{       FDP$DELETE_VARIABLE (FORM_IDENTIFIER, VARIABLE_NAME, STATUS)
{
{ FORM_IDENTIFIER: (input)  This parameter specifies the form identifier for
{       the instance of the form.
{
{ VARIABLE_NAME: (input)  This parameter specifies the variable to delete.
{
{ STATUS: (output) This parameter specifies the name of the variable to set to
{       indicate the status of the request.
{
{       condition identifiers: fde$bad_data_value
{                              fde$cannot_change_form
{                              fde$invalid_form_identifier
{                              fde$invalid_variable_name
{                              fde$unknown_variable_name
{
