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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 unindex(cls, id_, es=None, index=None):
 """Removes a particular item from the search index. :arg id_: The Elasticsearch id for the document to remove from the index. :arg es: The `Elasticsearch` to use. If you don't specify an `Elasticsearch`, it'll use `cls.get_es()`. :arg index: The name of the index to use. If you don't specify one it'll use `cls.get_index()`. """

        if es is None:
            es = cls.get_es()

        if index is None:
            index = cls.get_index()

        es.delete(index=index, doc_type=cls.get_mapping_type_name(), id=id_)