msd-xrdb-manager.c: avoid deprecated 'gtk_widget_ensure_style'

Author: sc0w

plugins/xrdb/msd-xrdb-manager.c

@@ -500,7 +500,6 @@ msd_xrdb_manager_start (MsdXrdbManager *manager,
                           manager);
 
         manager->priv->widget = gtk_window_new (GTK_WINDOW_TOPLEVEL);
-        gtk_widget_ensure_style (manager->priv->widget);
 
         mate_settings_profile_end (NULL);