hiding nullvoice

[Walt North]

I have a case where for vocalist I want to show melody and lyrics while 
for guitar player just the chords and lyrics.  I was thinking I could 
use nullvoice to align the lyrics for Both.  But Nullvoice is insisting 
on showing an empty staff.  I've tried using removeallemptystaves. Is 
there any way around this. Thanks for any insight you can provide.

Sample code and result image are below.
\version "2.24.2"

\layout {
  \context {
    \Staff
    \RemoveAllEmptyStaves
  }
    \context {
    \NullVoice
    \RemoveAllEmptyStaves
  }
    \context {
    \Voice
    \RemoveAllEmptyStaves
  }
}

ch = \chordmode { c1 c }

notes = \relative c' {
  c4 d e f8 f |
  c4 d e f |
}

ly = \lyricmode {
  First measure will start here
  Second measure starts here
}

\markup "For vocalist"
\score {
  <<
    \new Voice = "one" \notes
    \new Lyrics \lyricsto "one" \ly
  >>
}

\markup "For guitarist"
\score {
  <<
    \new ChordNames \ch
    \new NullVoice = "one" \notes
    \new Lyrics \lyricsto "one" \ly
  >>
}