test: fix broken resourcegraph test

Problem: t10001-resourcegraph.py expects JGF graphs to be directed.

Drop the checks for directed-ness.

t/python/t10001-resourcegraph.py

@@ -68,31 +68,25 @@ def _check_metadata(self, metadata):
 
     def test_basic(self):
         graph = FluxionResourceGraphV1(RV1)
-        self.assertTrue(graph.is_directed())
         j = graph.to_JSON()
         json.dumps(j)  # make sure it doesn't throw an error
-        self.assertTrue(j["graph"]["directed"])
         self.assertEqual(len(j["graph"]["nodes"]), len(graph.get_nodes()))
         self.assertEqual(len(j["graph"]["edges"]), len(graph.get_edges()))
         for node in graph.get_nodes():
             self._check_metadata(node.get_metadata())
 
     def test_basic_2(self):
         graph = FluxionResourceGraphV1(RV1_2)
-        self.assertTrue(graph.is_directed())
         j = graph.to_JSON()
         json.dumps(j)
-        self.assertTrue(j["graph"]["directed"])
         self.assertEqual(len(j["graph"]["nodes"]), len(graph.get_nodes()))
         self.assertEqual(len(j["graph"]["edges"]), len(graph.get_edges()))
         for node in graph.get_nodes():
             self._check_metadata(node.get_metadata())
 
     def test_basic_3(self):
         graph = FluxionResourceGraphV1(RV1_3)
-        self.assertTrue(graph.is_directed())
         j = graph.to_JSON()
-        self.assertTrue(j["graph"]["directed"])
         self.assertEqual(len(j["graph"]["nodes"]), len(graph.get_nodes()))
         self.assertEqual(len(j["graph"]["edges"]), len(graph.get_edges()))
         for node in graph.get_nodes():