sm8450-common: rootdir: avoid setting permission for /dev/hw_random

Below patch from system/core is setting required access policy
for /dev/hw_random. And CTS test is updated accordingly

https://android-review.googlesource.com/c/platform/system/core/+/2229337
https://android-review.googlesource.com/c/platform/cts/+/2232052

Change-Id: I762dfa3b1e84dee6c49fc178b5b75cf1c134cfb7

rootdir/etc/ueventd.qcom.rc

@@ -209,7 +209,6 @@ subsystem mem_buf_vm
 /dev/msm_vidc_dec_sec     0660   system     audio
 /dev/msm_vidc_enc         0660   system     audio
 /dev/msm_rotator          0660   system     system
-/dev/hw_random            0600   root       root
 /dev/sdsprpc-smd          0660   system     system
 
 #permissions for audio