delete unused test data

(No, this is not a Game Maker Language project)

Change-Id: I7a3e79f82da785ddde4f8bb42b398936b161506d
Reviewed-on: http://gerrit.esdi-community.eu/3213
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>