Revert "Python API: Add enum and union support."

This reverts commit a5ee900fb7.

Some of the unit tests breaks. Backing out until fixed.

Change-Id: I1846fb417db44a2a772f7b59cda8bcfe6d39f8c3
Signed-off-by: Ole Troan <ot@cisco.com>

test/vpp_papi_provider.py

@@ -70,7 +70,7 @@ class VppPapiProvider(object):
             for filename in fnmatch.filter(filenames, '*.api.json'):
                 jsonfiles.append(os.path.join(root, filename))
 
-        self.vpp = VPP(jsonfiles, logger=test_class.logger, read_timeout=5)
+        self.vpp = VPP(jsonfiles, logger=test_class.logger)
         self._events = deque()
 
     def __enter__(self):