remove TX TIMESYNC event display

src/lorawan.cpp

@@ -305,12 +305,6 @@ void onEvent(ev_t ev) {
 
   case EV_TXSTART:
     if (!(LMIC.opmode & OP_JOINING)) {
-#if (TIME_SYNC_LORASERVER)
-      // if last packet sent was a timesync request, store TX time
-      if (LMIC.pendTxPort == TIMEPORT)
-        strcpy_P(buff, PSTR("TX TIMESYNC"));
-      else
-#endif
       strcpy_P(buff, PSTR("TX START"));
     }
     break;