{
{    Delete an existing field.
{
{       AVP$DELETE_FIELD (FIELD_NAME, DESCRIPTION_RECORD_NAME,
{             FILE_INFORMATION, STATUS)
{
{ FIELD_NAME: (input) Name of the field to be deleted.
{
{ DESCRIPTION_RECORD_NAME: (input) Name of the description record containing
{       the field to be deleted.
{
{ FILE_INFORMATION: (input, output) Record used by the template file manager
{       to hold information about the template file.
{
{ STATUS: (output) Variable in which the completion status is returned.
{       CONDITIONS:
{             ave$field_was_deleted
{             ave$unknown_description_record
{             ave$unknown_field
{
