[2.2.13] Egg Zapper's lasers forget how to despawn

When Eggman shoots out a laser attack in GFZ3, the laser objects aren't fully removed afterwards, causing their thinkers to continue piling up over time, causing lag that does not go away until a map reset.

In the gif here we can see Remove, which refers to pending removal but I had to scale the resolution down so that the text would be legible, continuously rises by a large margin each time eggman shoots his lasers, and never decreases.

(gif was recorded on custom build but can confirm issue also occurs in vanilla just didn't want to have to redo all my settings)

Though the issue rarely becomes a problem in vanilla due to how quickly one usually defeats the boss, any mod that uses A_Boss1Laser, or a source port of it like we do for mrce, may discover it occurring much more easily.