Remove a few merged versionadded/changed.

Doc/library/csv.rst

@@ -121,13 +121,9 @@ The :mod:`csv` module defines the following functions:
 
 .. function:: get_dialect(name)
 
-   Return the dialect associated with *name*.  An :exc:`Error` is raised if *name*
-   is not a registered dialect name.
-
-   .. versionchanged:: 2.5
-      This function now returns an immutable :class:`Dialect`.  Previously an
-      instance of the requested dialect was returned.  Users could modify the
-      underlying class, changing the behavior of active readers and writers.
+   Return the dialect associated with *name*.  An :exc:`Error` is raised if
+   *name* is not a registered dialect name.  This function returns an immutable
+   :class:`Dialect`.
 
 .. function:: list_dialects()
 

Doc/library/exceptions.rst

@@ -147,9 +147,6 @@ The following exceptions are the exceptions that are actually raised.
    This class is derived from :exc:`EnvironmentError`.  See the discussion above
    for more information on exception instance attributes.
 
-   .. versionchanged:: 2.6
-      Changed :exc:`socket.error` to use this as a base class.
-
 
 .. exception:: ImportError
 

Doc/library/readline.rst

@@ -132,7 +132,6 @@ The :mod:`readline` module defines the following functions:
 
    Get the type of completion being attempted.
 
-   .. versionadded:: 2.6
 
 .. function:: get_begidx()
 
@@ -153,6 +152,7 @@ The :mod:`readline` module defines the following functions:
 
    Get the readline word delimiters for tab-completion.
 
+
 .. function:: set_completion_display_matches_hook([function])
 
    Set or remove the completion display function.  If *function* is
@@ -162,7 +162,6 @@ The :mod:`readline` module defines the following functions:
    ``function(substitution, [matches], longest_match_length)`` once
    each time matches need to be displayed.
 
-   .. versionadded:: 2.6
 
 .. function:: add_history(line)
 

Doc/library/socket.rst

@@ -85,9 +85,6 @@ The module :mod:`socket` exports the following constants and functions:
    accompanying :exc:`os.error`. See the module :mod:`errno`, which contains names
    for the error codes defined by the underlying operating system.
 
-   .. versionchanged:: 2.6
-      :exc:`socket.error` is now a child class of :exc:`IOError`.
-
 
 .. exception:: herror
 

Doc/library/stdtypes.rst

@@ -1438,8 +1438,6 @@ operations:
    Return True if the set has no elements in common with *other*.
    Sets are disjoint if and only if their interesection is the empty set.
 
-   .. versionadded:: 2.6
-
 .. method:: set.issubset(other)
             set <= other