Revert "Support building wheels (PEP-427)"

'universal=True' means app supports py2 and py3 which isn't supported by
savanna at least due to the eventlet dependency, so, my bad, it should
be reverted atm. W/o 'universal=True' wheel bdist still could be built.

This reverts commit 8bf80d5e88e7ed9c74866a332673a5e7a5fa8a81

Change-Id: I50250b4b6341ddbbe7eefc9b6fa3c58b786f5e75
Merge "Revert "Support building wheels (PEP-427)""