AP_InertialSensor: disable kill IMUs with HAL_MINIMIZE_FEATURES

libraries/AP_InertialSensor/AP_InertialSensor.cpp

@@ -2045,6 +2045,7 @@ AP_InertialSensor::Gyro_Calibration_Timing AP_InertialSensor::gyro_calibration_t
     return (Gyro_Calibration_Timing)_gyro_cal_timing.get();
 }
 
+#if !HAL_MINIMIZE_FEATURES
 /*
   update IMU kill mask, used for testing IMU failover
  */
@@ -2067,6 +2068,7 @@ void AP_InertialSensor::kill_imu(uint8_t imu_idx, bool kill_it)
         imu_kill_mask &= ~(1U<<imu_idx);
     }
 }
+#endif // HAL_MINIMIZE_FEATURES
 
 
 namespace AP {