how to remove marks automatically

[Stefan Thomas]

Dear community,

I would like to remove automatically all the "\mark \markup { \box { LETTER } }" in the below quoted text. Can I do this with regex? Does someone know how?

Thanks,

Stefan

\version "2.22.2"

violine =  {
    \clef "treble" | % 1
    R1*8 | % 9
    \mark \markup { \box { A   } } R1*8 -\markup{ \tiny {Lija+Tambor} }
    \mark \markup { \box { B   } } 
     R1*8 
    \mark \markup { \box { C   } } 
    r4 <f'' b''>2. \fermata :32 
    }