Remove merged versionadded tags from os docs.
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 1b5eb49..4dbeac3 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -114,10 +114,6 @@
automatically when an item is deleted from ``os.environ``, and when
one of the :meth:`pop` or :meth:`clear` methods is called.
- .. versionchanged:: 2.6
- Also unset environment variables when calling :meth:`os.environ.clear`
- and :meth:`os.environ.pop`.
-
.. function:: chdir(path)
fchdir(fd)
@@ -422,8 +418,6 @@
Change the mode of the file given by *fd* to the numeric *mode*. See the docs
for :func:`chmod` for possible values of *mode*. Availability: Unix.
- .. versionadded:: 2.6
-
.. function:: fchown(fd, uid, gid)
@@ -431,8 +425,6 @@
and *gid*. To leave one of the ids unchanged, set it to -1.
Availability: Unix.
- .. versionadded:: 2.6
-
.. function:: fdatasync(fd)
@@ -803,8 +795,6 @@
affects the symlink rather than the target. See the docs for :func:`chmod`
for possible values of *mode*. Availability: Unix.
- .. versionadded:: 2.6
-
.. function:: lchown(path, uid, gid)