Removing Fingering_engraver

[Nick Payne]

Just curious - the Internals Reference says that fingering is in the 
Voice context, but when I remove it I still see fingering. I would have 
expected the code below to remove the fingering, but it doesn't. I'd 
like to be able to publish a fingered score without fingering for those 
who prefer to work out their own. I also tried removing it from Score 
and Staff contexts without the fingering disappearing:

\version "2.17.12"

\score {
    \relative c' {
        <c-4>4
    }
    \layout {
        \context {
            \Voice
                \remove "Fingering_engraver"
        }
    }
}