Removed documentation for future_builtins

Doc/library/future_builtins.rst

-:mod:`future_builtins` --- Python 3 builtins
-============================================
-
-.. module:: future_builtins
-.. sectionauthor:: Georg Brandl
-.. versionadded:: 2.6
-
-This module provides functions that exist in 2.x, but have different behavior in
-Python 3, so they cannot be put into the 2.x builtin namespace.
-
-Instead, if you want to write code compatible with Python 3 builtins, import
-them from this module, like this::
-
-   from future_builtins import map, filter
-
-   ... code using Python 3-style map and filter ...
-
-The :program:`2to3` tool that ports Python 2 code to Python 3 will recognize
-this usage and leave the new builtins alone.
-
-.. note::
-
-   The Python 3 :func:`print` function is already in the builtins, but cannot be
-   accessed from Python 2 code unless you use the appropriate future statement::
-
-      from __future__ import print_function
-
-
-Available builtins are:
-
-.. function:: filter(function, iterable)
-
-   Works like :func:`itertools.ifilter`.
-
-.. function:: hex(object)
-
-   Works like the builtin :func:`hex`, but instead of :meth:`__hex__` it will
-   use the :meth:`__index__` method on its argument to get an integer that is
-   then converted to hexadecimal.
-
-.. function:: map(function, iterable, ...)
-
-   Works like :func:`itertools.imap`.
-
-.. function:: oct(object)
-
-   Works like the builtin :func:`oct`, but instead of :meth:`__oct__` it will
-   use the :meth:`__index__` method on its argument to get an integer that is
-   then converted to hexadecimal.
-
-.. function:: zip(*iterables)
-
-   Works like :func:`itertools.izip`.

Doc/library/python.rst

@@ -14,7 +14,6 @@ overview:
 
    sys.rst
    builtins.rst
-   future_builtins.rst
    __main__.rst
    warnings.rst
    contextlib.rst