meta-shr: remove systemd-speed-hacks from VIRTUAL-RUNTIME_init_manager

* it was removed from meta-systemd

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
openssh: drop bbappend

* PermitEmptyPasswords is now correctly handled by debug-tweaks IMAGE_FEATURE

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>