def remove_variables(df, variables):
    """
    Drop given variables from the dataframe and 
    returns the new dataframe

    Parameters
    - df: (pandas dataframe) dataframe
    - variables: (list of strings) list of variables to remove

    Return
    - df: (pandas dataframe) dataframe
    """
    if len(variables) > 0:
        df = df.drop(variables, axis = 1)

    return df