lxc: drop RT_GROUP_SCHED
lxc: drop RT_GROUP_SCHED

The group scheduling options in the lxc fragment were initially
used to support performance guaranteed systems using containers.

This option now causes issues with systemd runtimes and the
original feature it implemented is no longer relevant

Signed-off-by: Bruce Ashfield <284cc737d174a260eec2a2a6324a304f84b1ae0f@gmail.com>

lgirdk/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization