private String getKey(final String namespace, final String name) {
        return String.format("%s-%s", namespace, name);
    }
Remove specified ingress by service and ingress.

@param namespace service namespace
@param serviceName service name
@param ingressNamespace ingress namespace
@param ingressName ingress name
shenyu-kubernetes-controller/src/main/java/org/apache/shenyu/k8s/cache/ServiceIngressCache.java