remove unused func deprecatedAlias

pkg/kubectl/cmd/cmd_test.go

@@ -17,16 +17,12 @@ limitations under the License.
 package cmd
 
 import (
-	"bytes"
 	"fmt"
 	"io/ioutil"
 	"os"
 	"reflect"
-	"strings"
 	"testing"
 
-	"github.com/spf13/cobra"
-
 	"k8s.io/cli-runtime/pkg/genericclioptions"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 )
@@ -57,56 +53,6 @@ func TestNormalizationFuncGlobalExistence(t *testing.T) {
 	}
 }
 
-func Test_deprecatedAlias(t *testing.T) {
-	var correctCommandCalled bool
-	makeCobraCommand := func() *cobra.Command {
-		cobraCmd := new(cobra.Command)
-		cobraCmd.Use = "print five lines"
-		cobraCmd.Run = func(*cobra.Command, []string) {
-			correctCommandCalled = true
-		}
-		return cobraCmd
-	}
-
-	original := makeCobraCommand()
-	alias := deprecatedAlias("echo", makeCobraCommand())
-
-	if len(alias.Deprecated) == 0 {
-		t.Error("deprecatedAlias should always have a non-empty .Deprecated")
-	}
-	if !strings.Contains(alias.Deprecated, "print") {
-		t.Error("deprecatedAlias should give the name of the new function in its .Deprecated field")
-	}
-	if !alias.Hidden {
-		t.Error("deprecatedAlias should never have .Hidden == false (deprecated aliases should be hidden)")
-	}
-
-	if alias.Name() != "echo" {
-		t.Errorf("deprecatedAlias has name %q, expected %q",
-			alias.Name(), "echo")
-	}
-	if original.Name() != "print" {
-		t.Errorf("original command has name %q, expected %q",
-			original.Name(), "print")
-	}
-
-	buffer := new(bytes.Buffer)
-	alias.SetOutput(buffer)
-	alias.Execute()
-	str := buffer.String()
-	if !strings.Contains(str, "deprecated") || !strings.Contains(str, "print") {
-		t.Errorf("deprecation warning %q does not include enough information", str)
-	}
-
-	// It would be nice to test to see that original.Run == alias.Run
-	// Unfortunately Golang does not allow comparing functions. I could do
-	// this with reflect, but that's technically invoking undefined
-	// behavior. Best we can do is make sure that the function is called.
-	if !correctCommandCalled {
-		t.Errorf("original function doesn't appear to have been called by alias")
-	}
-}
-
 func TestKubectlCommandHandlesPlugins(t *testing.T) {
 	tests := []struct {
 		name             string