Revert "Support building wheels (PEP-427)"
'universal=True' means app supports py2 and py3 which isn't checked
right now for savanna client, so, my bad, it should reverted atm.
W/o 'universal=True' wheel bdist still could be built.
This reverts commit c73fcd1656
Change-Id: Ic56d9f484eab487562cf6d9d0623cf750c0ff237
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