osmo-bts-trx config: remove settsc

In osmo-bts change I51aeb17661dfd63ff347f7b2c0d7ffa383ec814c the settsc config
item is being removed. To be able to test it, drop the settsc option from the
config.

Change-Id: I58002a84b6b0104de4fb5c7cade27b263e375c1f
diff --git a/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl b/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl
index 1737947..9ef2547 100644
--- a/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl
+++ b/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl
@@ -21,7 +21,6 @@
  ipa unit-id ${osmo_bts_trx.ipa_unit_id} 0
  oml remote-ip ${osmo_bts_trx.oml_remote_ip}
  pcu-socket ${osmo_bts_trx.pcu_socket_path}
- settsc
  gsmtap-sapi bcch
  gsmtap-sapi ccch
  gsmtap-sapi rach