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Tear down Python to Haskell constant conversion infrastructure, which
includes eliminating the autotool 'convert-constants' and the Haskell
module, namely 'Ganeti.PyConstants', which held the converted
contants.
Signed-off-by: Jose A. Lopes <jabolopes@google.com>
Reviewed-by: Klaus Aehlig <aehlig@google.com>