code: def remove_field(self, field_name):
          
          field = self._fields.pop(field_name, None)
          if field is not None and field.default is not None:
              if six.callable(field.default):
                  self._default_callables.pop(field.key, None)
              else:
                  self._defaults.pop(field.key, None)
docs: Remove the field with the received field name from model.