Direct3D: remove wall-paper playlist hack

This is now managed by the playlist and video output core.

modules/video_output/msw/direct3d.c

@@ -39,7 +39,6 @@
 
 #include <vlc_common.h>
 #include <vlc_plugin.h>
-#include <vlc_playlist.h>
 #include <vlc_vout_display.h>
 
 #include <windows.h>
@@ -1452,14 +1451,5 @@ static int DesktopCallback(vlc_object_t *object, char const *psz_cmd,
     sys->ch_desktop |= ch_desktop;
     sys->desktop_requested = newval.b_bool;
     vlc_mutex_unlock(&sys->lock);
-
-    /* FIXME we should have a way to export variable to be saved */
-    if (ch_desktop) {
-        playlist_t *p_playlist = pl_Get(vd);
-        /* Modify playlist as well because the vout might have to be
-         * restarted */
-        var_Create(p_playlist, "video-wallpaper", VLC_VAR_BOOL);
-        var_SetBool(p_playlist, "video-wallpaper", newval.b_bool);
-    }
     return VLC_SUCCESS;
 }