Remove --emulate-rf option and corresponding code

With the RFemulator, there is no need for a dedicated --emulate-rf
option anymore. For all uses of --emulate-rf, RFemulator should be used
instead.

openair1/SIMULATION/LTE_PHY/dlsim.c

@@ -90,7 +90,6 @@ static int cmpdouble(const void *p1, const void *p2) {
 }
 RAN_CONTEXT_t RC;
 
-int emulate_rf = 0;
 void handler(int sig) {
   void *array[10];
   size_t size;

openair1/SIMULATION/LTE_PHY/mbmssim.c

@@ -89,8 +89,6 @@ int n_rx_dropped = 0; /*!< \brief initial max process time for rx */
 
 THREAD_STRUCT thread_struct;
 
-int emulate_rf = 0;
-
 void handler(int sig) {
   void *array[10];
   size_t size;