[tahoe-lafs-trac-stream] [pycryptopp] #105: fix pyflakes warnings

[pycryptopp]

#105: fix pyflakes warnings
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     Reporter:  dawuud   |      Owner:
         Type:  defect   |     Status:  new
     Priority:  blocker  |  Milestone:
      Version:  0.5.29   |   Keywords:
Launchpad Bug:           |
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 i noticed the buildbot warnings from pyflakes.
 let's fix this so that buildbot doesn't report any warnings.

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Ticket URL: <https://tahoe-lafs.org/trac/pycryptopp/ticket/105>
pycryptopp <https://Tahoe-LAFS.org/trac/pycryptopp>
python bindings to the (C++) "Crypto++" library