[3.13] Doc/library/os.rst: Remove spurious parenthesis (GH-139205) (GH-139218)

`Doc/library/os.rst`: Remove spurious parenthesis (GH-139205)
(cherry picked from commit 9c3d09b984)

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>

Doc/library/os.rst

@@ -1937,8 +1937,8 @@ features:
   must be a string specifying a file path.  However, some functions now
   alternatively accept an open file descriptor for their *path* argument.
   The function will then operate on the file referred to by the descriptor.
-  (For POSIX systems, Python will call the variant of the function prefixed
-  with ``f`` (e.g. call ``fchdir`` instead of ``chdir``).)
+  For POSIX systems, Python will call the variant of the function prefixed
+  with ``f`` (e.g. call ``fchdir`` instead of ``chdir``).
 
   You can check whether or not *path* can be specified as a file descriptor
   for a particular function on your platform using :data:`os.supports_fd`.
@@ -1953,7 +1953,7 @@ features:
 * **paths relative to directory descriptors:** If *dir_fd* is not ``None``, it
   should be a file descriptor referring to a directory, and the path to operate
   on should be relative; path will then be relative to that directory.  If the
-  path is absolute, *dir_fd* is ignored.  (For POSIX systems, Python will call
+  path is absolute, *dir_fd* is ignored.  For POSIX systems, Python will call
   the variant of the function with an ``at`` suffix and possibly prefixed with
   ``f`` (e.g. call ``faccessat`` instead of ``access``).
 
@@ -1966,8 +1966,8 @@ features:
 * **not following symlinks:** If *follow_symlinks* is
   ``False``, and the last element of the path to operate on is a symbolic link,
   the function will operate on the symbolic link itself rather than the file
-  pointed to by the link.  (For POSIX systems, Python will call the ``l...``
-  variant of the function.)
+  pointed to by the link.  For POSIX systems, Python will call the ``l...``
+  variant of the function.
 
   You can check whether or not *follow_symlinks* is supported for a particular
   function on your platform using :data:`os.supports_follow_symlinks`.