cli/cmd/health.go: remove check if kubeconfig exists

The subcommand function will fail anyway while trying to read kubeconfig
file, so there is no need to check it twice.

Also part of #608.

Signed-off-by: Mateusz Gozdek <mateusz@kinvolk.io>

cli/cmd/health.go

@@ -28,10 +28,9 @@ import (
 )
 
 var healthCmd = &cobra.Command{
-	Use:               "health",
-	Short:             "Get the health of a cluster",
-	Run:               runHealth,
-	PersistentPreRunE: doesKubeconfigExist,
+	Use:   "health",
+	Short: "Get the health of a cluster",
+	Run:   runHealth,
 }
 
 func init() {

cli/cmd/utils.go

@@ -16,12 +16,10 @@ package cmd
 
 import (
 	"fmt"
-	"os"
 	"path/filepath"
 
 	"github.com/hashicorp/hcl/v2"
 	"github.com/mitchellh/go-homedir"
-	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 
 	"github.com/kinvolk/lokomotive/pkg/backend"
@@ -127,19 +125,6 @@ func assetsKubeconfig(assetDir string) string {
 	return filepath.Join(assetDir, "cluster-assets", "auth", "kubeconfig")
 }
 
-// doesKubeconfigExist checks if the kubeconfig provided by user exists
-func doesKubeconfigExist(*cobra.Command, []string) error {
-	var err error
-	kubeconfig, err := getKubeconfig()
-	if err != nil {
-		return err
-	}
-	if _, err = os.Stat(kubeconfig); os.IsNotExist(err) {
-		return fmt.Errorf("Kubeconfig %q not found", kubeconfig)
-	}
-	return err
-}
-
 func getLokoConfig() (*config.Config, hcl.Diagnostics) {
 	return config.LoadConfig(viper.GetString("lokocfg"), viper.GetString("lokocfg-vars"))
 }