Fix length check in MD helper

Author: killianmuldoon

test/framework/machinedeployment_helpers.go

@@ -527,7 +527,7 @@ func ScaleAndWaitMachineDeploymentTopology(ctx context.Context, input ScaleAndWa
 	Expect(input.ClusterProxy).ToNot(BeNil(), "Invalid argument. input.ClusterProxy can't be nil when calling ScaleAndWaitMachineDeployment")
 	Expect(input.Cluster).ToNot(BeNil(), "Invalid argument. input.Cluster can't be nil when calling ScaleAndWaitMachineDeployment")
 	Expect(input.Cluster.Spec.Topology.Workers).ToNot(BeNil(), "Invalid argument. input.Cluster must have MachineDeployment topologies")
-	Expect(len(input.Cluster.Spec.Topology.Workers.MachineDeployments)).NotTo(BeEmpty(), "Invalid argument. input.Cluster must have at least one MachineDeployment topology")
+	Expect(input.Cluster.Spec.Topology.Workers.MachineDeployments).NotTo(BeEmpty(), "Invalid argument. input.Cluster must have at least one MachineDeployment topology")
 
 	mdTopology := input.Cluster.Spec.Topology.Workers.MachineDeployments[0]
 	log.Logf("Scaling machine deployment topology %s from %d to %d replicas", mdTopology.Name, *mdTopology.Replicas, input.Replicas)