refactor(Cars): backing property 삭제

src/main/kotlin/model/Cars.kt

@@ -1,14 +1,10 @@
 package model
 
-class Cars(cars: List<Car>) {
- private val _cars: List<Car> = cars
- val cars: List<Car> get() = _cars
-
+class Cars(val cars: List<Car>) {
  constructor(input: String) : this(input.split(",").mapIndexed { _, name -> Car(name.trim()) })
-
- fun getCar(index: Int): Car = _cars[index]
- fun getCarSize(): Int = _cars.size
+ fun getCar(index: Int): Car = cars[index]
+ fun getCarSize(): Int = cars.size
  fun move(index: Int, condition: Int) {
- _cars[index].move(condition)
+ cars[index].move(condition)
  }
 }