Move itertools izip() code to builtins as zip().  Complete the renaming.
diff --git a/Lib/test/seq_tests.py b/Lib/test/seq_tests.py
index dfa18c5..dd12ee3 100644
--- a/Lib/test/seq_tests.py
+++ b/Lib/test/seq_tests.py
@@ -79,7 +79,7 @@
     def __next__(self):
         raise StopIteration
 
-from itertools import chain, map
+from itertools import chain
 def itermulti(seqn):
     'Test multiple tiers of iterators'
     return chain(map(lambda x:x, iterfunc(IterGen(Sequence(seqn)))))