TST: skip testing on windows for specific formatting which sometimes hangs (#14851)

xref #14626
(cherry picked from commit 34807fc25e)

pandas/tests/indexes/test_base.py

@@ -914,23 +914,12 @@ class TestIndex(Base, tm.TestCase):
         self._check_method_works(Index.format)
 
         # GH 14626
-        # our formatting is different by definition when we have
-        # ms vs us precision (e.g. trailing zeros);
-        # so don't compare this case
-        def datetime_now_without_trailing_zeros():
-            now = datetime.now()
-
-            while str(now).endswith("000"):
-                now = datetime.now()
-
-            return now
-
-        index = Index([datetime_now_without_trailing_zeros()])
-
         # windows has different precision on datetime.datetime.now (it doesn't
         # include us since the default for Timestamp shows these but Index
-        # formating does not we are skipping
-        if not is_platform_windows():
+        # formating does not we are skipping)
+        now = datetime.now()
+        if not str(now).endswith("000"):
+            index = Index([now])
             formatted = index.format()
             expected = [str(index[0])]
             self.assertEqual(formatted, expected)