[fs.path.native.obs] Remove bogus note.

Author: jensmaurer

source/iostreams.tex

@@ -13819,13 +13819,6 @@
 \pnum
 \returns
 \tcode{native()}.
-
-\pnum
-\begin{note}
-Conversion to \tcode{string_type} is provided so that an
-  object of class \tcode{path} can be given as an argument to existing
-  standard library file stream constructors and open functions.
-\end{note}
 \end{itemdescr}
 
 \indexlibrarymember{string}{path}%