fix sorting

src/search_algoritms/a_star.py

@@ -31,17 +31,11 @@ def a_star(field: List[List[Tile]], start_x: int, start_y: int, start_direction:
                 neighbour_node == node_in_queue and neighbour_node.cost < node_in_queue.cost
             ]):
                 node_queue[index[0]] = neighbour_node
-                node_queue = sorted(node_queue, key=itemgetter(0))
+                node_queue.sort()
 
     return False, False
 
 
-def heuristic(a: Tuple[int, int], b: Tuple[int, int]):
-    (x1, y1) = a
-    (x2, y2) = b
-    return abs(x1 - x2) + abs(y1 - y2)
-
-
 def nearest_bomb(a: Tuple[int, int], field: List[List[Tile]]):
     min = 20
     min_x = 0