cli/command/image: rm redundant TestPrintImageTreeNoWarningWhenRedirected

This is already covered by various tests using .golden files.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

cli/command/image/tree_test.go

@@ -157,17 +157,6 @@ func TestPrintImageTreeAnsiTty(t *testing.T) {
 	}
 }
 
-func TestPrintImageTreeNoWarningWhenRedirected(t *testing.T) {
-	cli := test.NewFakeCli(nil)
-	cli.Out().SetIsTerminal(false)
-	cli.Err().SetIsTerminal(false)
-
-	printImageTree(cli, treeView{images: []topImage{}})
-
-	errOut := cli.ErrBuffer().String()
-	assert.Check(t, !strings.Contains(errOut, "WARNING: This output is designed for human readability"), "stderr should not contain warning when output is redirected, got: %s", errOut)
-}
-
 func TestPrintImageTreeGolden(t *testing.T) {
 	testCases := []struct {
 		name     string