removed unused GML file from XSD test bundle

Change-Id: I502248faad67fab2ebb9c39bc2fd3077020209c5
Reviewed-on: http://gerrit.esdi-community.eu/3215
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>
Tested-by: Simon Templer <simon.templer@igd.fraunhofer.de>