Issue #21875: Remove vestigial references to Classic Mac OS in os module docs.

Doc/library/os.rst

@@ -1382,9 +1382,8 @@ Files and Directories
 
    .. versionchanged:: 2.3
       If :func:`stat_float_times` returns ``True``, the time values are floats, measuring
-      seconds. Fractions of a second may be reported if the system supports that. On
-      Mac OS, the times are always floats. See :func:`stat_float_times` for further
-      discussion.
+      seconds. Fractions of a second may be reported if the system supports that.
+      See :func:`stat_float_times` for further discussion.
 
    On some Unix systems (such as Linux), the following attributes may also be
    available:
@@ -1400,12 +1399,6 @@ Files and Directories
    * :attr:`st_gen` - file generation number
    * :attr:`st_birthtime` - time of file creation
 
-   On Mac OS systems, the following attributes may also be available:
-
-   * :attr:`st_rsize`
-   * :attr:`st_creator`
-   * :attr:`st_type`
-
    On RISCOS systems, the following attributes are also available:
 
    * :attr:`st_ftype` (file type)

Lib/os.py

-r"""OS routines for Mac, NT, or Posix depending on what system we're on.
+r"""OS routines for NT or Posix depending on what system we're on.
 
 This exports:
   - all functions from posix, nt, os2, or ce, e.g. unlink, stat, etc.