fix test_csv

Lib/test/test_csv.py

@@ -291,18 +291,6 @@ class Test_Csv(unittest.TestCase):
             self.assertRaises(TypeError, writer.writerows, None)
             self.assertRaises(OSError, writer.writerows, BadIterable())
 
-    @support.cpython_only
-    @support.requires_legacy_unicode_capi()
-    @warnings_helper.ignore_warnings(category=DeprecationWarning)
-    def test_writerows_legacy_strings(self):
-        import _testcapi
-        c = _testcapi.unicode_legacy_string('a')
-        with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
-            writer = csv.writer(fileobj)
-            writer.writerows([[c]])
-            fileobj.seek(0)
-            self.assertEqual(fileobj.read(), "a\r\n")
-
     def _read_test(self, input, expect, **kwargs):
         reader = csv.reader(input, **kwargs)
         result = list(reader)