Fix blaze remap and entity destroy in 1.15

Fixes #1542

common/src/main/java/us/myles/ViaVersion/api/entities/Entity1_15Types.java

@@ -102,7 +102,7 @@ public class Entity1_15Types {
 
         // Monsters
         ABSTRACT_MONSTER(-1, ABSTRACT_CREATURE),
-        BLAZE(4, ABSTRACT_MONSTER),
+        BLAZE(5, ABSTRACT_MONSTER),
         CREEPER(12, ABSTRACT_MONSTER),
         ENDERMITE(21, ABSTRACT_MONSTER),
         ENDERMAN(20, ABSTRACT_MONSTER),

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_15to1_14_4/Protocol1_15To1_14_4.java

@@ -199,7 +199,7 @@ public class Protocol1_15To1_14_4 extends Protocol {
         registerOutgoing(State.PLAY, 0x34, 0x35);
         registerOutgoing(State.PLAY, 0x35, 0x36);
         registerOutgoing(State.PLAY, 0x36, 0x37);
-        registerOutgoing(State.PLAY, 0x37, 0x38);
+
         registerOutgoing(State.PLAY, 0x38, 0x39);
         registerOutgoing(State.PLAY, 0x39, 0x3A);
         registerOutgoing(State.PLAY, 0x3B, 0x3C);

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_15to1_14_4/packets/EntityPackets.java

@@ -128,6 +128,23 @@ public class EntityPackets {
                 });
             }
         });
+
+        // Destroy entities
+        protocol.registerOutgoing(State.PLAY, 0x37, 0x38, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT_ARRAY);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        EntityTracker entityTracker = wrapper.user().get(EntityTracker.class);
+                        for (int entity : wrapper.get(Type.VAR_INT_ARRAY, 0)) {
+                            entityTracker.removeEntity(entity);
+                        }
+                    }
+                });
+            }
+        });
     }
 
     public static int getNewEntityId(int oldId) {