cmd/containerboot: fix some lint.

Signed-off-by: David Anderson <danderson@tailscale.com>

cmd/containerboot/kube.go

@@ -84,7 +84,7 @@ func storeDeviceID(ctx context.Context, secretName, deviceID string) error {
 	}
 
 	m := map[string]map[string]string{
-		"stringData": map[string]string{
+		"stringData": {
 			"device_id": deviceID,
 		},
 	}

cmd/containerboot/main_test.go

@@ -688,7 +688,7 @@ func (k *kubeServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	case "GET":
 		w.Header().Set("Content-Type", "application/json")
 		ret := map[string]map[string]string{
-			"data": map[string]string{},
+			"data": {},
 		}
 		k.Lock()
 		defer k.Unlock()