priv_app: Remove rules for system_update_service

We added an auditallow for these permissions on 11/26/2019, and have not
seen any recent logs for this in go/sedenials. No other priv-app should
rely on this now that gmscore is running in its own domain.

Bug: 142672293
Test: TH
Change-Id: Ic2f68b3af861e0c00e2dea731c4d6b3255ab5175
1 file changed