bug: Entities Not Removed from Spatial Map After Destruction

[ArthurMbraga]

Describe the bug

When an entity is destroyed, it is not removed from the spatial map, causing the destroyed entity to still be retrievable from its previous location and consuming memory.

Version

kaplay: 3001.0.0-beta.1

To Reproduce

1. Create a level.
2. Spawn a game object at location (0,0).
3. Destroy this game object.
4. Attempt to retrieve the object at location (0,0).
5. The destroyed object is still returned.

kaplay();

loadSprite("grass", "/sprites/grass.png");

const level = addLevel([
    " =",
], {
    tileWidth: 64,
    tileHeight: 64,
    tiles: {
        "=": () => [
            sprite("grass"),
        ],
    },
});

const pos = vec2(0, 0)
level.spawn("=", pos)

wait(1, () => {
    const obj = level.getAt(pos)
    console.log(obj) 
    destroy(obj[0])
})

wait(2, () => {
    // shouldn't print the object
    const obj = level.getAt(pos)
    console.log(obj)
})

Expected behavior

When an entity is destroyed, it should be removed from the spatial map and should not be retrievable in step 5.