[Telephony] Remove IOem in ril am: 899ef068c6 am: f315484700 am: 6658592db8

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/ril/+/14759714

Change-Id: Ie008b9c143d2a6fb9295f64a8dfb1aa578bed27a