Revert "Add "obsoletes" notice on setup.py"
Revert "Add "obsoletes" notice on setup.py"

That change broke the build. Reverting it while investigating the root cause.

This reverts commit beb997d4b4f4a78d2d204f67852389b9c9b800e5.

datapackages/datapackage-py,okfn/datapackage-py,okfn/datapackage-model-py,okfn/datapackage-py,sirex/datapackage-py,okfn/datapackage-model-py,datapackages/datapackage-py,sirex/datapackage-py