bsc: drop access-list-name from osmo-bsc.cfg
This configuration option is unused. Related: the IMSI filtering access list is
being dropped from osmo-bsc, which might cause test fallout.
Related: I89727af5387e8360362e995fdee959883c37d89a (osmo-bsc)
Change-Id: Ied8d766ba230b93cb1185fc8b1a77f5540dfdbc1
