priv_app: Remove permission to read from /data/anr/traces.txt

We added an auditallow for this permission on 12/17/2019, 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: 147833123
Test: TH
Change-Id: I96f810a55e0eb8f3778aea9598f6437de0f65c7f
1 file changed