Drops fields from a dictionary where value is None.

    >>> _drop_none_values({'greeting': 'hello', 'name': None})
    {'greeting': 'hello'}

def _drop_none_values(dictionary: Dict) -> Dict:
    """Drops fields from a dictionary where value is None.

    >>> _drop_none_values({'greeting': 'hello', 'name': None})
    {'greeting': 'hello'}
    """
    return {key: value for key, value in dictionary.items() if value is not None}