AP_TemperatureSensor: add support for simulated TSYS01 temperature sensor

libraries/AP_TemperatureSensor/TSYS01.cpp

@@ -15,9 +15,6 @@ static const uint8_t TSYS01_CMD_READ_ADC    = 0x00;
 
 bool TSYS01::init(uint8_t bus)
 {
-#if CONFIG_HAL_BOARD == HAL_BOARD_SITL
-    return false;
-#endif
     _dev = std::move(hal.i2c_mgr->get_device(bus, TSYS01_ADDR));
     if (!_dev) {
         printf("TSYS01 device is null!");

libraries/AP_TemperatureSensor/TSYS01.h

@@ -16,20 +16,13 @@ public:
     bool init(uint8_t bus);
     float temperature(void) { return _temperature; } // temperature in degrees C
     bool healthy(void) { // do we have a valid temperature reading?
-#if CONFIG_HAL_BOARD == HAL_BOARD_SITL
-        return true;
-#endif
         return _healthy;
     }
 
     AP_HAL::OwnPtr<AP_HAL::Device> _dev;
 
 private:
-#if CONFIG_HAL_BOARD == HAL_BOARD_SITL
-    float _temperature = 42.42; // degrees C
-#else
     float _temperature; // degrees C
-#endif
     bool _healthy; // we have a valid temperature reading to report
     uint16_t _k[5]; // internal calibration for temperature calculation
     bool _reset(void); // reset device