Revert "init: enable auto-loki for att and vzw variants"

* not ready yet, causes loki to be run on devices that don't need it
* will unrevert when this is merged:
  http://review.cyanogenmod.org/#/c/59620/

This reverts commit 472729138ddf1bb5f97dafaf1b270cb158841801.

Change-Id: Ia1129774196a412ae1e7d589a091dba7443e41bb