Controlling slur engraver

[Helge Kruse]

Hello,

I want to prepare a score that should include the slurs. I was requested 
to remove the slurs, since "the historic scores did not have "such 
things, only acciaturas similar have slurs". But I would like to keep 
the slurs inside the Lilypond sources and use the benefit of Lilyponds 
engravers.

Unfortunately I did not find a way to differentiate between normal slurs 
and appigiaturas. Is there a way to remove the "real slurs"?

\score {
  \relative c' {
    a'8.( b16) b8.\mordent( a32 b) cis8-. cis, cis4~ | % 40
    cis8 b16 a b8-. b-. \appoggiatura{cis16} b8 a  r4 | % 41
  }

  \layout {
% this will remove the slurs, but it removes everything.
%    \context { \Voice \remove "Slur_engraver" }
  }
}

Regards,
Helge