meta-shr: libcgroup remove bbappend with PRINC only

* it was added when pam DISTRO_FEATURE was added to shr.conf

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
meta-shr: meta-samsung: remove systemd bbappends

* meta-samsung had only PRINC now
* hopefully everybody upgraded from sysvinit completely now (see n900 in meta-shr bbappend)

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