Removes a mapping based on its absolute address.

        :param absolute_address: An absolute address

def unmap_by_address(self, absolute_address):
        """
        Removes a mapping based on its absolute address.

        :param absolute_address: An absolute address
        """

        desc = self._address_to_region_id[absolute_address]
        del self._address_to_region_id[absolute_address]
        del self._region_id_to_address[desc.region_id]