Revert "Raise a RuntimeError when tee iterator is consumed from different threads (GH-15567)" (GH-15736)
This reverts commit fa220ec7633e9674baccc28dde987f29d7f65141.
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst
index 8e7899e..a3f403a 100644
--- a/Doc/library/itertools.rst
+++ b/Doc/library/itertools.rst
@@ -643,8 +643,7 @@
Once :func:`tee` has made a split, the original *iterable* should not be
used anywhere else; otherwise, the *iterable* could get advanced without
- the tee objects being informed. the :func:`tee` iterator can not be consumed
- from different threads, even if an underlying iterator is thread-safe.
+ the tee objects being informed.
This itertool may require significant auxiliary storage (depending on how
much temporary data needs to be stored). In general, if one iterator uses