This module parameter is never set to false anymore, since latest
already supports the feature for a while.
The module parameter will be removed soon in osmo-ttcn3-hacks, so let's
drop using it here too.
Change-Id: Idf459365e9aa42f7efd2a418cadea63ec49bdd7a
The purpose is to run osmo-ttcn3-hacks/bsc/BSC_Tests_VAMOS.ttcn with
osmo-bts-omldummy -f VAMOS
(send BTS_FEAT_VAMOS = true).
Change-Id: I2146388bf683cfba99cef5592b8b141c3a6eabb1