Removing worker_group_count from test fixture

examples/eks_test_fixture/main.tf

@@ -73,7 +73,6 @@ module "eks" {
   tags               = "${local.tags}"
   vpc_id             = "${module.vpc.vpc_id}"
   worker_groups      = "${local.worker_groups}"
-  worker_group_count = "1"
   map_roles          = "${var.map_roles}"
   map_users          = "${var.map_users}"
   map_accounts       = "${var.map_accounts}"