Fix previous commit

modules/video_output/xcb/events.c

@@ -107,7 +107,6 @@ void RegisterMouseEvents (vlc_object_t *obj, xcb_connection_t *conn,
         xcb_change_window_attributes (conn, wnd,
                                       XCB_CW_EVENT_MASK, &value);
     }
-    var_Destroy (obj, "mouse-events");
 }
 
 /* NOTE: we assume no other thread will be _setting_ our video output events

modules/video_output/xcb/window.c

@@ -608,7 +608,6 @@ static int EmOpen (vlc_object_t *obj)
     xcb_window_t window = var_InheritInteger (obj, "drawable-xid");
     if (window == 0)
         return VLC_EGENERIC;
-    var_Destroy (obj, "drawable-xid");
 
     if (AcquireDrawable (obj, window))
         return VLC_EGENERIC;