Remove xfail from unet export test. (#767)

Author: monorimet

models/turbine_models/tests/sd_test.py

@@ -196,7 +196,6 @@ def testExportClipModel(self):
         del current_args
         del turbine
 
-    @unittest.expectedFailure
     def testExportUnetModel(self):
         current_args = copy.deepcopy(default_arguments)
         blob_name = unet.export_unet_model(