mapping(): Remove this function since it does not add anything to the API.

Lib/weakref.py

@@ -19,17 +19,10 @@ from _weakref import \
 
 ProxyTypes = (ProxyType, CallableProxyType)
 
-__all__ = ["ref", "mapping", "proxy", "getweakrefcount", "getweakrefs",
+__all__ = ["ref", "proxy", "getweakrefcount", "getweakrefs",
            "WeakKeyDictionary", "ReferenceType", "ProxyType",
            "CallableProxyType", "ProxyTypes", "WeakValueDictionary"]
 
-def mapping(dict=None,weakkeys=0):
-    if weakkeys:
-        return WeakKeyDictionary(dict)
-    else:
-        return WeakValueDictionary(dict)
-
-
 class WeakValueDictionary(UserDict.UserDict):
 
     # We inherit the constructor without worrying about the input