let RhythmicStaff use default barline extent

There is no reason to make barlines in RhythmicStaff special.
The purpose of the deleted code was probably to ensure that
the barlines were visible at all (despite the fact that there
is just one staffline in a RhythmicStaff).  However, currently
barline code takes care of this by default.

This makes barlines in DrumStaff and RhythmicStaff similar.

A comment by Keith:
The book by Kurt Stone happens to have some bar-lines in single-line percussion
staves that are as tall as a 4/4 time-signature.  Other examples in the same
book have short bar-lines like these here, and looking at some scores the short
bar-lines are more common.

diff --git a/ly/engraver-init.ly b/ly/engraver-init.ly
index 9c8547dd7d024f8e6b0f6b07d9683e7ede62dd94..4d002257fb008657b20d4ed7c79b34ad58c56503 100644 (file)
--- a/ly/engraver-init.ly
+++ b/ly/engraver-init.ly
@@ -169,7 +169,6 @@ contained staves are not connected vertically."
   \name RhythmicStaff
   \alias "Staff"
 
-  \override BarLine.bar-extent = #'(-2 . 2)
   \override VoltaBracket.staff-padding = #3
   \override StaffSymbol.line-count = #1