def remove_useless_features(training_data):
    """Create features and targets

    Args:
        training_data (list): List of Dataframe containing data from each file.

    Returns:
        dict : Dictionary containing features and target for each file.
    """
    data_dict = {}

    for key, data in training_data.items():

        features = data.drop(columns=["_ID"])
        data_dict[key] = features

    return data_dict