srs_{enb,ue}: don't set sc12 as OTW format

Change-Id: I7fc20d998b082f5c37b2451f1900161f997954b1
diff --git a/src/osmo_gsm_tester/obj/enb_srs.py b/src/osmo_gsm_tester/obj/enb_srs.py
index 70f2f35..95de16f 100644
--- a/src/osmo_gsm_tester/obj/enb_srs.py
+++ b/src/osmo_gsm_tester/obj/enb_srs.py
@@ -199,10 +199,6 @@
                 elif self._num_prb > 25:
                     rf_dev_args += 'num_recv_frames=64,num_send_frames=64'
 
-                if self._num_prb > 50:
-                    # Reduce over the wire format to sc12
-                    rf_dev_args += ',otw_format=sc12'
-
                 config.overlay(values, dict(enb=dict(rf_dev_args=rf_dev_args)))
 
         self.gen_conf = values
diff --git a/src/osmo_gsm_tester/obj/ms_srs.py b/src/osmo_gsm_tester/obj/ms_srs.py
index cb29f06..8604d32 100644
--- a/src/osmo_gsm_tester/obj/ms_srs.py
+++ b/src/osmo_gsm_tester/obj/ms_srs.py
@@ -285,10 +285,6 @@
                 elif self.enb.num_prb() > 50:
                     rf_dev_args += 'num_recv_frames=64,num_send_frames=64'
 
-                # For 15 and 20 MHz, further reduce over the wire format to sc12
-                if self.enb.num_prb() >= 75:
-                    rf_dev_args += ',otw_format=sc12'
-
                 config.overlay(values, dict(ue=dict(rf_dev_args=rf_dev_args)))
 
         self.dbg('SRSUE CONFIG:\n' + pprint.pformat(values))