def remove_tors(tors1, tors2):
    """
    return the tors2 from tors 1
    """
    out_tors = []
    for torsion1 in tors1:
        found = 0
        for torsion2 in tors2:
            if torsion1 == torsion2:
                found = 1
        if found == 0:
            out_tors.append(torsion1)
    return out_tors
