Issues 2186 and 2187. Move map() from itertools to builtins.
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index 9e3d64f..ca3c02e 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -1560,10 +1560,10 @@
     def __next__(self):
         raise StopIteration
 
-from itertools import chain, imap
+from itertools import chain
 def L(seqn):
     'Test multiple tiers of iterators'
-    return chain(imap(lambda x:x, R(Ig(G(seqn)))))
+    return chain(map(lambda x:x, R(Ig(G(seqn)))))
 
 class TestVariousIteratorArgs(unittest.TestCase):