use original tokenizer config

tokenizer_config.json

@@ -2057,8 +2057,6 @@
     "input_ids",
     "attention_mask"
   ],
-  "model_max_length": 2048,
-  "pad_token": "<|eot_id|>",
-  "padding_side": "left",
+  "model_max_length": 131072,
   "tokenizer_class": "PreTrainedTokenizerFast"
 }