Use existing clearstatcache note.

reference/filesystem/functions/touch.xml

@@ -135,16 +135,7 @@ if (!touch('some_file.txt', $time)) {
  <refsect1 role="notes">
   &reftitle.notes;
   &note.filesystem-time-res;
-  <note>
-   <simpara>
-    Updates to the <literal>mtime</literal> or <literal>atime</literal>
-    of a file will not be reflected immediately in filesystem operations
-    such as <function>filemtime</function>.  That's because the information
-    is cached, and this function does not automatically clear the cache.
-    To have changes reflected in the application immediately, call
-    <function>clearstatcache</function> on the file.
-   </simpara>
-  </note>
+  &note.clearstatcache;
  </refsect1>
 
  <refsect1 role="seealso">