no-issue: remove unused import from test_graphlib.py (GH-29853)

diff --git a/Lib/test/test_graphlib.py b/Lib/test/test_graphlib.py
index 86246a62ed64220a79c4dd60bd54b9e056157b2b..5f38af4024c5b07f6191a3b146e449d546561f73 100644 (file)
--- a/Lib/test/test_graphlib.py
+++ b/Lib/test/test_graphlib.py
@@ -1,4 +1,3 @@
-from itertools import chain
 import graphlib
 import os
 import unittest
@@ -34,7 +33,7 @@ class TestTopologicalSort(unittest.TestCase):
         try:
             ts.prepare()
         except graphlib.CycleError as e:
-            msg, seq = e.args
+            _, seq = e.args
             self.assertIn(" ".join(map(str, cycle)), " ".join(map(str, seq * 2)))
         else:
             raise