remove obsolete rss/ directory

Change-Id: Icb33e39276134f0d0e4ae6ebd9f8edb66c4e47ef

share/qtcreator/rss/featured.rss

-<?xml version="1.0" encoding="utf-8" ?>
-<rss version="2.0">
-  <channel>
-    <title>Featured</title>
-    <link>http://qt.nokia.com/</link>
-    <description>Offline content of featured articles</description>
-    <lastBuildDate>Fri, 17 Sep 2010 10:30:00 GMT</lastBuildDate>
-    <language>en-us</language>
-    <item>
-      <title>How to create a Qt Quick application</title>
-      <category>Tutorial</category>
-      <link>qthelp://com.nokia.qtcreator/doc/creator-qml-application.html</link>
-      <guid>qthelp://com.nokia.qtcreator/doc/creator-qml-application.html</guid>
-      <pubDate>Mon, 12 Sep 2005 18:37:00 GMT</pubDate>
-      <description><![CDATA[ This tutorial describes how to use the Qt Creator to implement the states and transitions example application. ]]></description>
-      <image>
-        <link>images/qtquick.png</link>
-      </image>
-    </item>
-  </channel>
-</rss>