Fix CME from raids

Use the iterator to remove elements

Spigot-Server-Patches/0407-Fix-CME-from-raids.patch

@@ -0,0 +1,23 @@
+From c846b7f9757ee1c83c7b4aa80c3b1a1458566e67 Mon Sep 17 00:00:00 2001
+From: Shane Freeder <theboyetronic@gmail.com>
+Date: Wed, 26 Jun 2019 01:20:55 +0100
+Subject: [PATCH] Fix CME from raids
+
+Use the iterator to remove elements
+
+diff --git a/src/main/java/net/minecraft/server/Raid.java b/src/main/java/net/minecraft/server/Raid.java
+index 6c1bbefd71..58c33f1000 100644
+--- a/src/main/java/net/minecraft/server/Raid.java
++++ b/src/main/java/net/minecraft/server/Raid.java
+@@ -144,7 +144,7 @@ public class Raid {
+             BlockPosition blockposition = new BlockPosition(entityplayer);
+ 
+             if (this.k.c_(blockposition) != this) {
+-                set.remove(entityplayer);
++                iterator.remove(); // Paper - Use iterator
+                 this.r.removePlayer(entityplayer);
+             }
+         }
+-- 
+2.22.0
+