get rid of some api bloat; this can be gotten from the wallpaper plugin itself, after all

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=850854

containment.cpp

@@ -1176,12 +1176,6 @@ Plasma::Wallpaper* Containment::wallpaper() const
     return d->wallpaper;
 }
 
-QString Containment::wallpaperMode() const
-{
-    KConfigGroup cfg = config();
-    return cfg.readEntry("wallpaperpluginmode", QString());
-}
-
 void Containment::setActivity(const QString &activity)
 {
     if (d->activity != activity) {

containment.h

@@ -295,11 +295,6 @@ class PLASMA_EXPORT Containment : public Applet
          */
         Plasma::Wallpaper* wallpaper() const;
 
-        /**
-         * Return wallpaper mode.
-         */
-        QString wallpaperMode() const;
-
         /**
          * Sets the current activity by name
          *