修复切换场景未移除问题

source/src/Math/Point.ts

@@ -1,9 +0,0 @@
-class Point {
-    public x: number;
-    public y: number;
-
-    constructor(x?: number, y?: number){
-        this.x = x ? x : 0;
-        this.y = y ? y : this.x;
-    }
-}

source/src/Math/Rectangle.ts

@@ -86,7 +86,7 @@ class Rectangle {
         return new Rectangle(minX, minY, maxX - minX, maxY - minY);
     }
 
-    public getClosestPointOnRectangleBorderToPoint(point: Point): { res: Vector2, edgeNormal: Vector2 } {
+    public getClosestPointOnRectangleBorderToPoint(point: Vector2): { res: Vector2, edgeNormal: Vector2 } {
         let edgeNormal = new Vector2(0, 0);
 
         let res = new Vector2(0, 0);