SPIGOT-2474: Use .die() to set entity remove status

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java

@@ -275,7 +275,7 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
     }
 
     public void remove() {
-        entity.dead = true;
+        entity.die();
     }
 
     public boolean isDead() {