Deprecate `ui.wcfSlideshow`

Because it is not (or no longer) used in the software.

see #5974

diff --git a/wcfsetup/install/files/js/WCF.js b/wcfsetup/install/files/js/WCF.js
index df7157db4570533aed743212df819a73208a98d0..a917725a13b353227af972530651ba013ad2e241 100755 (executable)
--- a/wcfsetup/install/files/js/WCF.js
+++ b/wcfsetup/install/files/js/WCF.js
@@ -6153,6 +6153,8 @@ jQuery.fn.extend({
 
 /**
  * Provides a slideshow for lists.
+ * 
+ * @deprecated 6.2 Not (or no longer) used in the software.
  */
 $.widget('ui.wcfSlideshow', {
        /**