Removed unnecessary text (#5)

- Removed unnecessary text (0d9feabdc6202011880a1b53d20443ad2a0cc486)


Co-authored-by: kapllan <kapllan@users.noreply.huggingface.co>

README.md

@@ -183,7 +183,7 @@ Google TPU v3-8
 
 pytorch, transformers.
 
-## Citation [optional]
+## Citation
 
 ```