procfs: remove redundant check for OpenVZ
procfs: remove redundant check for OpenVZ

The check for OpenVZ is not necessary since the procfs service already
will not run on OpenVZ due to the keywords setting.

dwfreed/openrc,williamh/openrc,dwfreed/openrc,williamh/openrc,OpenRC/openrc,dwfreed/openrc,OpenRC/openrc,williamh/openrc,OpenRC/openrc