ueventd: remove duplicate permissions

These are set incorrectly, and already exist in ueventd.rc. Fixes
Bluetooth tethering.

Change-Id: If7b7f7d67ffc45d328c3016dc095aa0fe3971687
(cherry picked from commit 0c3a5a742fc2f11c2583bf8c0040eec8fca583d1)