Removed confusing (unnecessary?) test assertion.

Author: theengineear

plotly/tests/test_optional/test_utils/test_utils.py

@@ -250,7 +250,6 @@ def test_numpy_masked_json_encoding():
     j1 = json.dumps(l, cls=utils.PlotlyJSONEncoder)
     print(j1)
     assert(j1 == '[1, 2, null]')
-    assert(set(l) == set([1, 2, np.ma.core.masked]))
 
 
 def test_masked_constants_example():