it has been deprecated in libosmocore.git 2.5 years ago:
commit 7e0686c6b4b456ec4e6e15689694b1bcf96c301f
Author: Neels Hofmeyr <neels@hofmeyr.de>
Date: Mon Sep 10 20:58:52 2018 +0200
Change-Id: Ia6946fae497319a894d4e664ac8642340620822e
That's the default value for all BTS, so no need to have it there.
Furthermore, forthcoming osmo-bts patches will drop osmo-bts-trx support
for DSP/HW based MS Power control, which means BTS will reject this
setting. Let's drop it now and let osmo-bts binary to select the
preferred one.
Related: OS#1851
Change-Id: I0f69880a5028002a53736653735c11ae3cd53f07