Remove unused "chat_template"

Hello!

## Pull Request overview
* Remove unused "chat_template"

## Details
This should help get rid of this warning:


cc @sclincha @slupart

- Tom Aarsen

tokenizer_config.json

@@ -24,7 +24,6 @@
   "model_max_length": 131072,
   "padding_side": "left",
   "pad_token": "<|endoftext|>",
-  "chat_template": null,
   "split_special_tokens": false,
   "tokenizer_class": "Qwen2Tokenizer",
   "unk_token": null