Update README.md

README.md

@@ -23,7 +23,6 @@ Task: Summarization
 ## Usage
 ```python
 from transformers import PegasusForConditionalGeneration,BertTokenizer
-from typing import List, Optional
                                             
 model = PegasusForConditionalGeneration.from_pretrained('dongxq/test_model')
 tokenizer = BertTokenizer.from_pretrained('dongxq/test_model')