examples: remove deprecated filter API call
examples: remove deprecated filter API call

fixes #178

dschoeffm/MoonGen,emmericp/MoonGen,gallenmu/MoonGen,gallenmu/MoonGen,scholzd/MoonGen,emmericp/MoonGen,gallenmu/MoonGen,gallenmu/MoonGen,scholzd/MoonGen,dschoeffm/MoonGen,scholzd/MoonGen,gallenmu/MoonGen,gallenmu/MoonGen,gallenmu/MoonGen,gallenmu/MoonGen,dschoeffm/MoonGen,emmericp/MoonGen