Use T.cleanup() to cleanup helm-action-test

T.Cleanup() is introduced since go-1.14

Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>

pkg/action/action_test.go

@@ -20,6 +20,7 @@ import (
 	"flag"
 	"io/ioutil"
 	"net/http"
+	"os"
 	"path/filepath"
 	"testing"
 
@@ -56,6 +57,8 @@ func actionConfigFixture(t *testing.T) *Configuration {
 		t.Fatal(err)
 	}
 
+	t.Cleanup(func() { os.RemoveAll(tdir) })
+
 	cache, err := registry.NewCache(
 		registry.CacheOptDebug(true),
 		registry.CacheOptRoot(filepath.Join(tdir, registry.CacheRootDir)),