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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_room_alias(self, room_alias):
 """Remove mapping of an alias Args: room_alias(str):
 The alias to be removed. Returns: bool: True if the alias is removed, False otherwise. """

        try:
            self.api.remove_room_alias(room_alias)
            return True
        except MatrixRequestError:
            return False