def drop_substring_from_str(item: str, substring: str) -> str:
    """Drops 'substring' from 'item'.
    
    Args:
        item (str): item to be modified.
        substring (str): substring to be added to 'item'.

    Returns:
        str: modified str.

    """
    if substring in item:
        return item.replace(substring, '')
    else:
        return item