Remove traces of division_warning left over from Python 2 (#10998)
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index d412e67..e18019c 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -501,7 +501,7 @@
 
     def test_sys_flags(self):
         self.assertTrue(sys.flags)
-        attrs = ("debug", "division_warning",
+        attrs = ("debug",
                  "inspect", "interactive", "optimize", "dont_write_bytecode",
                  "no_user_site", "no_site", "ignore_environment", "verbose",
                  "bytes_warning", "quiet")