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: I89b35fc587bbac6810511b2317eed24368858f37
1 file changed