[Bug] ConcurrentModificationException in CottonHud

[alex3236]

Describe the bug

java.util.ConcurrentModificationException
	at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1597)
	at java.base/java.util.HashMap$KeyIterator.next(HashMap.java:1620)
	at io.github.cottonmc.cotton.gui.client.CottonHud.lambda$static$0(CottonHud.java:30)
	at net.fabricmc.fabric.api.client.rendering.v1.HudRenderCallback.lambda$static$0(HudRenderCallback.java:27)
	at net.minecraft.class_329.handler$zgc000$render(class_329.java:1529)
	at net.minecraft.class_329.method_1753(class_329.java:415)
	at net.minecraft.class_757.method_3192(class_757.java:858)
	at net.minecraft.class_310.method_1523(class_310.java:1122)
	at net.minecraft.class_310.method_1514(class_310.java:737)
	at net.minecraft.client.main.Main.main(Main.java:236)
	at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:460)
	at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
	at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)

To Reproduce Steps to reproduce the behavior: (Maybe) Use CottonHud.remove to remove a HUD before the HudRenderCallback is finished

Expected behavior Optional A clear and concise description of what you expected to happen.

Screenshots Optional If applicable, add screenshots to help explain your problem.

Version of the (please complete the following information):

• LibGui 5.4.0 on 1.18.2

Additional context Optional Add any other context about the problem here.