AP_Beacon: pozyx: remove dead and pointless code

libraries/AP_Beacon/AP_Beacon_Pozyx.cpp

@@ -22,8 +22,7 @@ extern const AP_HAL::HAL& hal;
 
 // constructor
 AP_Beacon_Pozyx::AP_Beacon_Pozyx(AP_Beacon &frontend, AP_SerialManager &serial_manager) :
-    AP_Beacon_Backend(frontend),
-    linebuf_len(0)
+    AP_Beacon_Backend(frontend)
 {
     uart = serial_manager.find_serial(AP_SerialManager::SerialProtocol_Beacon, 0);
     if (uart != nullptr) {
@@ -41,12 +40,6 @@ bool AP_Beacon_Pozyx::healthy()
 // update the state of the sensor
 void AP_Beacon_Pozyx::update(void)
 {
-    static uint8_t counter = 0;
-    counter++;
-    if (counter > 200) {
-        counter = 0;
-    }
-
     if (uart == nullptr) {
         return;
     }