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remove decoder from name printing

The extra decoding step inside of name printing isn't useful.  It's only current utility is when the content inside of the list is a runtime.Unknown.  However, when you're making use of this printer in a CLI, you've read the content in via a builder or a scheme directly.  You would logically set this decoder based on that same scheme.  If you were unable to decode using the scheme before, you'll simple be unable to do it again here.

Near as I can tell, this would only be useful if objects weren't decoded before printing.  There is a unit test that ensures this remains.  I'd like to see if any practical tests (cmd, e2e) rely on it.

@smarterclayton @liggitt not many people would have written it to begin with.  One of you?

@kubernetes/sig-cli-maintainers 

```release-note
NONE
```