remove dupe code for making sure scenario.onReadyScript is an array
remove dupe code for making sure scenario.onReadyScript is an array

klausbayrhammer/BackstopJS,KMK-ONLINE/BackstopJS,cookchristopher/BackstopJS,limptwiglet/BackstopJS,limptwiglet/BackstopJS,cookchristopher/BackstopJS,klausbayrhammer/BackstopJS,KMK-ONLINE/BackstopJS,thepechinator/BackstopJS,mirzazeyrek/BackstopJS,garris/BackstopJS,mirzazeyrek/BackstopJS,garris/BackstopJS,garris/BackstopJS,thepechinator/BackstopJS