Remove unnecessary Lime calibration step from Soapy implementation

When using srsLTE with Lime devices, calibration was performed before any configuration steps have happened, thus making calibration values invalid. Removing Lime specific calibration step from rf_soapy_imp makes so that devices will be automatically calibrated by SoapyLMS on rf_soapy_start_stream call.

Tested and working with srsENB using LimeSDR-USB v1.4 and LimeSDR-Mini v1.2 boards.

lib/src/phy/rf/rf_soapy_imp.c

@@ -510,24 +510,6 @@ int rf_soapy_open_multi(char* args, void** h, uint32_t num_requested_channels)
   }
 #endif
 
-  // receive one subframe to allow for transceiver calibration
-  if (strstr(devname, "lime")) {
-    // set default tx gain and leave some time to calibrate tx
-    rf_soapy_set_tx_gain(handler, 45);
-    rf_soapy_set_rx_gain(handler, 35);
-
-    cf_t  dummy_buffer[1920];
-    cf_t* dummy_buffer_array[SRSLTE_MAX_PORTS];
-    for (int i = 0; i < SRSLTE_MAX_PORTS; i++) {
-      dummy_buffer_array[i] = dummy_buffer;
-    }
-    rf_soapy_start_rx_stream(handler, true);
-    rf_soapy_recv_with_time_multi(handler, (void**)dummy_buffer_array, 1920, false, NULL, NULL);
-    rf_soapy_stop_rx_stream(handler);
-
-    usleep(10000);
-  }
-
   // list gains and AGC mode
   bool has_agc = SoapySDRDevice_hasGainMode(handler->device, SOAPY_SDR_RX, 0);
   list         = SoapySDRDevice_listGains(handler->device, SOAPY_SDR_RX, 0, &list_length);