remove firefox feed subscribe integration code (obsolete)

		print "</div>"; # pane

		if (strpos($_SERVER['HTTP_USER_AGENT'], "Firefox") !== false) {

			print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Firefox integration')."\">";

			print_notice(__('This Tiny Tiny RSS site can be used as a Firefox Feed Reader by clicking the link below.'));

			print "<p>";

			print "<button onclick='window.navigator.registerContentHandler(" .

                      "\"application/vnd.mozilla.maybe.feed\", " .

                      "\"" . $this->subscribe_to_feed_url() . "\", " . " \"Tiny Tiny RSS\")'>" .

							 __('Click here to register this site as a feed reader.') .

				"</button>";

			print "</p>";

			print "</div>"; # pane

		}

		print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Published & shared articles / Generated feeds')."\">";

		print "<p>" . __('Published articles are exported as a public RSS feed and can be subscribed by anyone who knows the URL specified below.') . "</p>";