def METHOD_NAME(body, default_font='Cambria'):
    """Remove text runs with the default font."""
    new_body = []
    for etype, runs in body:
        new_runs = []
        for run in runs:
            if run.family == default_font:
                run = run._replace(family=None)
            new_runs.append(run)
        new_body.append((etype, new_runs))
    return new_body