New in version 2.0.
Remove initial rests from sequence:
abjad> staff = Staff("r8 r8 c'8 d'8 r4 r4")
abjad> f(staff)
\new Staff {
r8
r8
c'8
d'8
r4
r4
}
abjad> leaftools.remove_initial_rests_from_sequence(staff)
[Note("c'8"), Note("d'8"), Rest('r4'), Rest('r4')]
abjad> f(staff)
\new Staff {
r8
r8
c'8
d'8
r4
r4
}
Return list.