def remove_null_values(dictionary: dict) -> dict:
    """Create a new dictionary without keys mapped to null values.

    Args:
        dictionary: The dictionary potentially containing keys mapped to values of None.

    Returns:
        A dict with no keys mapped to None.
    """
    if isinstance(dictionary, dict):
        return {k: v for (k, v) in dictionary.items() if v is not None}
    return dictionary