Removed  unused variable ‘cgroup_dir_path’ in lscgroup in function ‘display_controller_data’.
Removed  unused variable ‘cgroup_dir_path’ in lscgroup
in function ‘display_controller_data’.

Signed-off-by: Ivana Hutarova Varekova <2e3918a0a366ea7e658a2062ab582c898a7e1b1b@redhat.com>
Acked-By: Jan Safranek <a7f4b96ffdd515ecef00f117294da18555749b0b@redhat.com>
Reviewed-by: Balbir Singh <ac7b77b73f9d2cc0faddd296218dde0558e170e3@gmail.com>

rafalmiel/libcg,rafalmiel/libcg,rafalmiel/libcg,rafalmiel/libcg