Remove wierd unicode thing

wrappers/python/tests/TestBytes.py

@@ -23,13 +23,6 @@ class TestBytes(unittest.TestCase):
 
         assert newPositions == refPositions
 
-        # try encoding the checkpoint in utf-8. OpenMM should be able to handle this too
-        context.setPositions([(12345, 12345, 123451)])
-        context.loadCheckpoint(chk.decode('utf-8'))
-        newPositions = context.getState(getPositions=True).getPositions()._value
-
-        assert newPositions == refPositions
-
 
 if __name__ == '__main__':
     unittest.main()