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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def unversioned(cls, coord):
 """The coordinate without the version. :param M2Coordinate coord: an M2Coordinate or JarDependency. :return: the coordinate without the version. :rtype: M2Coordinate """

    coord = cls.create(coord)
    if coord.rev is None:
      return coord
    return M2Coordinate(org=coord.org, name=coord.name, classifier=coord.classifier, ext=coord.ext)