backout 66e30c4870bb for breaking OSX (#13150)
diff --git a/Lib/pprint.py b/Lib/pprint.py
index 330099d..910283e 100644
--- a/Lib/pprint.py
+++ b/Lib/pprint.py
@@ -37,10 +37,7 @@
 import sys as _sys
 import warnings
 
-try:
-    from cStringIO import StringIO as _StringIO
-except ImportError:
-    from StringIO import StringIO as _StringIO
+from cStringIO import StringIO as _StringIO
 
 __all__ = ["pprint","pformat","isreadable","isrecursive","saferepr",
            "PrettyPrinter"]