def remove_duplicates(items, key):
    """
    Remove all duplicates from a list of dict (items), based on unique keys
    """
    
    clean_items = []
    for i, item in enumerate(items):
        if not any(item[key] == item_[key] for item_ in items[i+1:]):
            clean_items.append(item)
            
    return clean_items