alsa-state: remove the init.d for non-sysvinit distros

- For non-sysvinit distros, even when sysvinit compatibility is enabled in
 sysvinit, we still don't want this init.d script, as alsa-utils-alsactl
 provides its own systemd services to handle saving/loading alsa state. The
 ideal fix for this is to move the startup script from alsa-state into
 alsa-utils-alsactl where the systemd services live, so systemd.bbclass can
 automatically kill the sysvinit scripts when appropriate.
- Including it will lead to an initscript-functions dependency at this time,
 but it isn't produced for non-sysvinit compatible distros, unless
 initscripts gets built somehow. I think ideally we need to alter update-rc.d
 to not just add an rdepends on initscripts-functions, but also a DEPENDS on
 initscripts when sysvinit is in DISTRO_FEATURES, to ensure it's always built
 so the runtime dependency can be satisfied.

JIRA: SB-2052

Signed-off-by: Christopher Larson <kergoth@gmail.com>