Removed unnecessary text (#2)

- Removed unnecessary text (3baf0e4bbcc10a3f45aa2f601f61c5e635217ade)


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

README.md

@@ -154,7 +154,7 @@ Google TPU v3-8
 
 pytorch, transformers.
 
-## Citation [optional]
+## Citation
 
 ```