[HVM-614] remove residual HVM/Linux stuff from zoneinit.
[HVM-614] remove residual HVM/Linux stuff from zoneinit.

kaizengarden/sdc-headnode,joyent/sdc-headnode,joyent/sdc-headnode,numericillustration/sdc-headnode,kaizengarden/sdc-headnode,joyent/sdc-headnode,kaizengarden/sdc-headnode,kaizengarden/sdc-headnode,joyent/sdc-headnode,numericillustration/sdc-headnode,numericillustration/sdc-headnode