Disable PRACH delay workaround in NR UE

Disable the PRACH workaround in NR UE. With the MIB/SIB delay
implemented on the gNB there is no longer a need to delay first
NR UE random access attempt.

executables/nr-uesoftmodem.c

@@ -467,10 +467,6 @@ int main(int argc, char **argv)
     get_channel_model_mode(uniqCfg);
   }
 
-  // Delay to allow the convergence of the IIR filter on PRACH noise measurements at gNB side
-  if (IS_SOFTMODEM_RFSIM && !get_softmodem_params()->phy_test)
-    sleep(3);
-
   if (!get_softmodem_params()->nsa && get_softmodem_params()->emulate_l1)
     start_oai_nrue_threads();