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