Update tokenizer_config.json

tokenizer_config.json

@@ -1 +1 @@
-{"do_lower_case": true, "max_len": 512, "unk_token": "[UNK]", "sep_token": "[SEP]", "pad_token": "[PAD]", "cls_token": "[CLS]", "mask_token": "[MASK]"}
+{"do_lower_case": true, "max_len": 512}