fix the e2e node helpers that let tests reconfigure Kubelet

The dynamic config tests were updated with the validation change, but
the tests that try to use dynamic config via this helper were not.

test/e2e_node/util.go

@@ -172,7 +172,6 @@ func setKubeletConfiguration(f *framework.Framework, kubeCfg *kubeletconfig.Kube
 		ConfigMap: &apiv1.ConfigMapNodeConfigSource{
 			Namespace:        "kube-system",
 			Name:             cm.Name,
-			UID:              cm.UID,
 			KubeletConfigKey: "kubelet",
 		},
 	}