Closes #15228: remove reference to Unix "touch"; it is confusing since the path needs to exist for os.utime() to succeed

Author: birkenfeld

Doc/library/os.rst

@@ -2104,8 +2104,6 @@ features:
    - If *times* and *ns* are both ``None``,
      this is equivalent to specifying ``ns=(atime_ns, mtime_ns)``
      where both times are the current time.
-     (The effect is similar to running the Unix program
-     :program:`touch` on *path*.)
 
    It is an error to specify tuples for both *times* and *ns*.