Helper function to request deletion of a field. This is necessary when you want to overwrite values instead of
      appending.

      <t:DeleteItemField>
        <t:FieldURI FieldURI="calendar:Resources"/>
      </t:DeleteItemField>

def delete_field(field_uri):
  """
      Helper function to request deletion of a field. This is necessary when you want to overwrite values instead of
      appending.

      <t:DeleteItemField>
        <t:FieldURI FieldURI="calendar:Resources"/>
      </t:DeleteItemField>
  """

  root = T.DeleteItemField(
    T.FieldURI(FieldURI=field_uri)
  )

  return root