SPIGOT-4890: EntityDeathEvent fires twice when breaking an armor stand in survival mode

nms-patches/EntityArmorStand.patch

@@ -88,7 +88,7 @@
                              this.f(damagesource);
                              this.D();
 -                            this.die();
-+                            this.killEntity(); // CraftBukkit - this.die() -> this.killEntity()
++                            this.die(); // CraftBukkit - SPIGOT-4890: remain as this.die() since above damagesource method will call death event
                          }
  
                          return true;