diff --git a/src/main/java/net/fabricmc/fabric/entity/EntityTrackingRegistry.java b/src/main/java/net/fabricmc/fabric/entity/EntityTrackingRegistry.java
index a62fd8ed7..26d299e74 100644
--- a/src/main/java/net/fabricmc/fabric/entity/EntityTrackingRegistry.java
+++ b/src/main/java/net/fabricmc/fabric/entity/EntityTrackingRegistry.java
@@ -19,6 +19,8 @@ package net.fabricmc.fabric.entity;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityType;
 import net.minecraft.network.Packet;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -26,6 +28,7 @@ import java.util.function.Function;
 
 // TODO: javadocs
 public class EntityTrackingRegistry {
+	private static final Logger LOGGER = LogManager.getLogger();
 	public static class Entry {
 		private final int trackingDistance;
 		private final int updateIntervalTicks;
@@ -52,7 +55,6 @@ public class EntityTrackingRegistry {
 
 	public static final EntityTrackingRegistry INSTANCE = new EntityTrackingRegistry();
 	private final Map<EntityType, Entry> entries = new HashMap<>();
-	private final Map<EntityType, Function<Entity, Packet>> spawnPacketProviders = new HashMap<>();
 
 	private EntityTrackingRegistry() {
 
@@ -62,13 +64,9 @@ public class EntityTrackingRegistry {
 		return entries.get(type);
 	}
 
+	@Deprecated
 	public Packet createSpawnPacket(Entity entity) {
-		Function<Entity, Packet> packetFunction = spawnPacketProviders.get(entity.getType());
-		if (packetFunction != null) {
-			return packetFunction.apply(entity);
-		} else {
-			return null;
-		}
+		return null;
 	}
 
 	public void register(EntityType type, int trackingDistance, int updateIntervalTicks) {
@@ -79,7 +77,8 @@ public class EntityTrackingRegistry {
 		entries.put(type, new Entry(trackingDistance, updateIntervalTicks, alwaysUpdateVelocity));
 	}
 
+	@Deprecated
 	public void registerSpawnPacketProvider(EntityType type, Function<Entity, Packet> packetFunction) {
-		spawnPacketProviders.put(type, packetFunction);
+		LOGGER.warn("[EntityTrackingRegistry] As of 19w05a, registerSpawnPacketProvider is a no-op! Update your mod!");
 	}
 }
diff --git a/src/main/java/net/fabricmc/fabric/mixin/entity/MixinEntityTrackerEntry.java b/src/main/java/net/fabricmc/fabric/mixin/entity/MixinEntityTrackerEntry.java
deleted file mode 100644
index 8c705e365..000000000
--- a/src/main/java/net/fabricmc/fabric/mixin/entity/MixinEntityTrackerEntry.java
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright (c) 2016, 2017, 2018 FabricMC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package net.fabricmc.fabric.mixin.entity;
-
-import net.fabricmc.fabric.entity.EntityTrackingRegistry;
-import net.minecraft.entity.Entity;
-import net.minecraft.network.Packet;
-import net.minecraft.server.network.EntityTrackerEntry;
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.Shadow;
-import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Inject;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
-
-@Mixin(EntityTrackerEntry.class)
-public class MixinEntityTrackerEntry {
-	@Shadow
-	private Entity entity;
-
-	@Inject(at = @At(value = "CONSTANT", args = {"stringValue=Don't know how to add "}), method = "createSpawnPacket", cancellable = true)
-	public void createSpawnPacket(CallbackInfoReturnable<Packet> info) {
-		Packet packet = EntityTrackingRegistry.INSTANCE.createSpawnPacket(entity);
-		if (packet != null) {
-			info.setReturnValue(packet);
-			info.cancel();
-		}
-	}
-}