'Remove a single data element.
Arguments:
data_name  -- The data element name to remove.'

def del_data(self, name):

    if (name in self._datas):
        datas = [i for i in self.iterables if isinstance(i, Field)]
        for data in datas:
            if (data['name'] == name):
                self.xml.remove(data.xml)
                self.iterables.remove(data)
                return True
    return False
