-$a->config['system']['allowed_themes'] = 'dispy,quattro,testbubble,vier,darkbubble,darkzero,duepuntozero,greenzero,purplezero,quattro-green,slackr,diabook,diabook-blue';
+$a->config['system']['allowed_themes'] = 'dispy,quattro,vier,darkzero,duepuntozero,greenzero,purplezero,slackr,diabook';