Remove annotation for ingres.class

This yield an error on new Kubernetes
TODO: check k8s version like does "helm create"?

helm/ingress.go

@@ -18,7 +18,6 @@ func NewIngress(name string) *Ingress {
 
 func (i *Ingress) SetIngressClass(name string) {
 	class := "{{ .Values." + name + ".ingress.class }}"
-	i.Metadata.Annotations["kubernetes.io/ingress.class"] = class
 	i.Spec.IngressClassName = class
 }