gsm_data_shared.h: Remove unused loc_list from struct gsm_bts
gsm_data_shared.h: Remove unused loc_list from struct gsm_bts

Change-Id: I52880962dfb0399c613048aa7ddfd828d3c6c933

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