Remove old note that os.popen() on Windows is unreliable; this is no
longer true.
diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index e4171cf..0586905 100644
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -282,9 +282,7 @@
the command (encoded in the format specified for \function{wait()}) is
available as the return value of the \method{close()} method of the file
object, except that when the exit status is zero (termination without
-errors), \code{None} is returned. \strong{Note:} This function
-behaves unreliably under Windows due to the native implementation of
-\cfunction{popen()}.
+errors), \code{None} is returned.
Availability: \UNIX{}, Windows.
\end{funcdesc}