Update tokenizer_config.json

tokenizer_config.json

@@ -16,8 +16,5 @@
   "extra_special_tokens": {},
   "model_max_length": 1024,
   "tokenizer_class": "GPT2Tokenizer",
-  "unk_token": "<|endoftext|>",
-   "auto_map": {
-    "AutoTokenizer": ["GPT2TokenizerFast", null]
-  }
+  "unk_token": "<|endoftext|>"
 }