Function bm_load does not exist in current tip, 0.58.1-d2x, 0.51-d2x,
nor various early snapshots of D2X (not D2X-Rebirth, just D2X).
Attempting to enable STATION_ENABLED fails without this function. Since
it seems to have been absent for at least 10 years (0.51-d2x tagged Feb
2007), and possibly more than 16 years (D2X snapshots from 2001), it
seems reasonable to assume no one has used this code in any open source
release. Remove it.