remove references to cPickle

Doc/library/copyreg.rst

@@ -7,14 +7,12 @@
 
 .. index::
    module: pickle
-   module: cPickle
    module: copy
 
-The :mod:`copyreg` module provides support for the :mod:`pickle` and
-:mod:`cPickle` modules.  The :mod:`copy` module is likely to use this in the
-future as well.  It provides configuration information about object constructors
-which are not classes.  Such constructors may be factory functions or class
-instances.
+The :mod:`copyreg` module provides support for the :mod:`pickle` module.  The
+:mod:`copy` module is likely to use this in the future as well.  It provides
+configuration information about object constructors which are not classes.
+Such constructors may be factory functions or class instances.
 
 
 .. function:: constructor(object)

Doc/library/shelve.rst

@@ -175,6 +175,3 @@ object)::
    Module :mod:`pickle`
       Object serialization used by :mod:`shelve`.
 
-   Module :mod:`cPickle`
-      High-performance version of :mod:`pickle`.
-