JavaScript删除不会删除所需的属性

我正在使用nodejs来创建游戏。碰巧这次我无法使用Delete。它不起作用，我也不知道为什么。

我执行这一行：

delete Bullet.list[i]

并且Bullet.list是具有属性的对象，执行此行后，所需的属性不会被删除。

这是我的代码（您可以在下面的上下文中看到以上代码行）：

var Map = require("./Map.js")
var Player = require("./Player.js");
var Bullet = require("./Bullet.js");
var Fly = require("./Fly.js");
var Settings = require("./Settings.js");

var Simulation = function(SOCKET_LIST){ 

//Update Bullets
for(var i in Bullet.list){
    var bullet = Bullet.list[i];
    bullet.update();

    var shooter = Player.list[bullet.parent];       
    //Bullets collide with flies
    for(var i in Fly.list){
        var fly = Fly.list[i];
        if(!bullet.toRemove && bullet.getDistance(fly) < 15){
            if(shooter){
                shooter.updateCoins(fly.killCoins);
                shooter.updateXp(fly.killXp);
            }
            bullet.toRemove = true;
            fly.toRemove = true;
        }
    }
    //Collide with player
    for(var i in Player.list){
        var player = Player.list[i];
        if(player.death) continue;
        if(!bullet.toRemove && bullet.getDistance(player) < 32 && shooter !== player.id && shooter.team != player.team && !player.immune){
            player.hp -= 1;
            player.hpChanged = true;
            if(player.hp <= 0){
                if(shooter)
                    player.kill(shooter);
                else
                    player.kill();
            }
            bullet.toRemove = true;
        }
    }
    //Collide with map
    if(typeof shooter == "undefined" || shooter.shootsCollideMap && Map.isColliding(bullet))
        bullet.toRemove = true;

    //Remove bullets
    if(bullet.toRemove){
        delete Bullet.list[i]; /*HERE IS THE PROBLEM. THE PROPERTY IS NOT BEING DELETED*/
        Bullet.removePack.push[bullet.id];
    }

}

我无法从对象Bullet.list中删除属性“ i”。