remove experimental commissions module

htdocs/commissions/admin/commissions.php

htdocs/commissions/index.php

htdocs/commissions/lib/commissions.lib.php

htdocs/core/modules/modCommissions.class.php

htdocs/langs/ca_ES/commissions.lang

htdocs/langs/en_US/commissions.lang

htdocs/langs/es_ES/commissions.lang

htdocs/langs/fr_FR/commissions.lang

htdocs/theme/auguria/img/object_commissions.png

htdocs/theme/bureau2crea/img/object_commissions.png

htdocs/theme/cameleo/img/object_commissions.png

htdocs/theme/eldy/img/object_commissions.png