It was removed by a simplistic convert-ly rule.
%% timing translator must come BEFORE bar number engraver
\consists "Timing_translator"
\consists "Default_bar_line_engraver"
%% timing translator must come BEFORE bar number engraver
\consists "Timing_translator"
\consists "Default_bar_line_engraver"
+ \consists "Output_property_engraver"
\consists "Tweak_engraver"
\consists "System_start_delimiter_engraver"
\consists "Mark_engraver"
\consists "Tweak_engraver"
\consists "System_start_delimiter_engraver"
\consists "Mark_engraver"