commented non generic serialization methods

Author: Extrys

com.unity.netcode.gameobjects/Runtime/Spawning/INetworkInstantiationPayloadSynchronizer.cs

@@ -16,7 +16,7 @@ public interface INetworkInstantiationPayloadSynchronizer
         /// </summary>
         /// <param name="serializer">The buffer serializer used to read or write custom instantiation data.</param>
         void OnSynchronize<T>(ref BufferSerializer<T> serializer) where T : IReaderWriter;
-        void Serialize(FastBufferWriter writer);
-        void Deserialize(FastBufferReader reader);
+        //void Serialize(FastBufferWriter writer);
+        //void Deserialize(FastBufferReader reader);
     }
 }