struct gsm_bts_trx: remove unused leftovers from openbsc
struct gsm_bts_trx: remove unused leftovers from openbsc

Change-Id: I667fc1d6a5eaccb69b45197da71d4a699f52fcfc

osmocom/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts