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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 remove(self, item):
 """Remove the first occurence of an item, the caseless way."""

        for entry in self:
            if item.lower() == entry.lower():
                list.remove(self, entry)
                return
        raise ValueError(': list.remove(x): x not in list')