Solve Codacy issues

Author: Flashky

src/main/java/com/adventofcode/flashk/day17/Tile.java

@@ -15,7 +15,6 @@
 @Setter
 public class Tile implements Comparable<Tile>{
 
-    private static final Vector2 REVERSE = new Vector2(-1,-1);
     public static final Vector2 RIGHT = Vector2.right();
     public static final Vector2 LEFT = Vector2.left();
     public static final Vector2 UP = Vector2.down();
@@ -26,10 +25,6 @@ public class Tile implements Comparable<Tile>{
     private int totalHeatloss = Integer.MAX_VALUE;
     private int heatloss;
 
-    //private Tile parent;
-    private Vector2 travelDirection;
-    private int travelLength;
-
     private final Set<Pair<Vector2, Integer>> visitedDirectionsPerLength = new HashSet<>();
 
     public Tile(int heatloss, int row, int col){