Revert "Support building wheels (PEP-427)"

'universal=True' means app supports py2 and py3 which isn't checked for savanna
dashboard (and horizon), so, my bad, it should be reverted atm.
W/o 'universal=True' wheel bdist still could be built.

This reverts commit 89c4cdb772f8cafa494d0c24d9c2d1e88c4105b8

Change-Id: If206a1778f00555845b8c559b6f9ae8b8a91a745
Merge "Revert "Support building wheels (PEP-427)""